Blood Relation Questions and Answers

Q: Read the following information carefully and answer the given questions.'A + B' means A is sister of B.'A - B' means A is husband of B.'A × B' means A is brother of B.'A ÷ B' means A is daughter of B.How is P related to M in the expression M ÷ L - N + P × Q ?

P is M's maternal uncle.Read the expression M ÷ L - N + P × Q step by step:M ÷ L: M is the daughter of L.L - N: L is the husband of N, so N is M's mother.N + P: N is the sister of P.P × Q: P is the brother of Q, so P is male.P is the brother of M's mother, that is, M's maternal uncle. He cannot be her father (that is L), her son, or her grandfather.

Q: A has 3 children. B is the brother of C and C is the sister of D, E who is wife of A is the mother of D. There is only one daughter of the husband of E. How is D related to B ?

D is B's brother.A and his wife E have three children: B, C and D. B is a brother of C, and C is a sister of D, so C is a daughter. The statement that A (the husband of E) has only one daughter means C is that daughter, so the third child, D, must be a son.D is therefore a son of the same parents as B, B's brother. 'Sister' is ruled out because C is the only daughter, and D cannot be B's mother or father since they are siblings.

Q: M is the son of 'P', 'Q' is the granddaughter of 'O' who is the husband of 'P'. How 'M' relates to 'O'?

M is O's son.M is the son of P, and O is the husband of P. So O is M's father, and M is O's son. The information that Q is O's granddaughter does not affect the relation between M and O.M is a son, so 'Daughter' and 'Mother' are wrong, and 'Father' reverses the relation: O is the father, M the son.

Q: P is the brother of D. X is the sister of P. A is the brother of F. F is the daughter of D. M is the father of X. Who is the uncle of A ?

The uncle of A is P.Work out A's parent first. F is the daughter of D, and A is the brother of F, so A is also a child of D. P is the brother of D, so P is the brother of A's parent, that is, A's uncle.X is the sister of P, so X is also a sibling of D and is A's aunt, not uncle. F is A's sister. M is the father of X, and so of P and D as well, which makes M A's grandfather.

Q: A is father of C and D is son of B. E is brother of A. If C is sister of D, how is B related to E ?

B is E's Sister-in-Law.C is a sister of D, so C and D are siblings. A is the father of C, and D is the son of B, so B is the other parent of the same children: B is A's wife, C and D's mother.E is the brother of A. The wife of one's brother is one's sister-in-law, so B is E's sister-in-law.B cannot be E's brother or brother-in-law, because as the children's mother B is female, and B is not E's sister, since B is related to E only by marriage.

Q: Pointing to a woman in a group photograph Rita said, "Her sister's father is the only son of my grandfather." How is Rita related to woman in the photograph ?

The woman is Rita's sister.Work from the end of Rita's statement. The only son of Rita's grandfather is Rita's father. So the woman's sister's father is Rita's father, which means the woman herself is a daughter of Rita's father.The woman and Rita therefore share a father, so the woman is Rita's sister. Nothing places her a generation above Rita, which rules out 'mother' and 'aunt', and nothing suggests a marriage, which rules out 'mother-in-law'.

Q: A is the brother of B, C is the father of D, E is the mother of B. A and D are brothers. How E relates to C?

E is C's Wife.A is B's brother and A and D are brothers, so A, B and D are siblings. E is B's mother, so she is the mother of all three; C is D's father, so he is the father of all three. The mother and father of the same children are husband and wife.Niece, sister and aunt would each place E outside the parent generation, which the facts rule out.Drawing a quick family tree, with C and E above A, B and D, makes the relation obvious.

Q: A's mother is sister of B and she has a daughter C, who is 21 years old. How is B related to C?

B is C's maternal uncle.A's mother is B's sister, and C is her daughter. So C is the daughter of B's sister, and B is the brother of C's mother, which makes B C's maternal uncle (the question treats B as male).B cannot be C's father, since C's mother is B's sister. 'Uncle' alone is less precise than 'maternal uncle', which names the mother's side, and 'daughter' is not a relation B can have to C here.

Q: Pointing to a woman, Ramesh said, "She is the daughter of the only son of my mother." How is the woman related to Ramesh ?

The woman is Ramesh's Daughter.The only son of Ramesh's mother is Ramesh himself (Ramesh being a man's name), so 'the daughter of the only son of my mother' is the daughter of Ramesh.She would be his sister only if she were his mother's daughter, his niece if she were a sibling's daughter, and his cousin if she were the child of his parent's sibling. The phrase 'only son' rules all of those out.

Important Instructions

51.

Read the following information carefully and answer the given questions.

'A + B' means A is sister of B.
'A - B' means A is husband of B.
'A × B' means A is brother of B.
'A ÷ B' means A is daughter of B.

How is P related to M in the expression M ÷ L - N + P × Q ?

A.Father
B.Maternal uncle
C.Son
D.Grandfather

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: B

P is M's maternal uncle.

Read the expression M ÷ L - N + P × Q step by step:

M ÷ L: M is the daughter of L.
L - N: L is the husband of N, so N is M's mother.
N + P: N is the sister of P.
P × Q: P is the brother of Q, so P is male.

P is the brother of M's mother, that is, M's maternal uncle. He cannot be her father (that is L), her son, or her grandfather.

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52.

A has 3 children. B is the brother of C and C is the sister of D, E who is wife of A is the mother of D. There is only one daughter of the husband of E. How is D related to B ?

A.Sister
B.Mother
C.Father
D.Brother

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: D

D is B's brother.

A and his wife E have three children: B, C and D. B is a brother of C, and C is a sister of D, so C is a daughter. The statement that A (the husband of E) has only one daughter means C is that daughter, so the third child, D, must be a son.

D is therefore a son of the same parents as B, B's brother. 'Sister' is ruled out because C is the only daughter, and D cannot be B's mother or father since they are siblings.

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53.

M is the son of 'P', 'Q' is the granddaughter of 'O' who is the husband of 'P'. How 'M' relates to 'O'?

A.Son
B.Daughter
C.Mother
D.Father

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: A

M is O's son.

M is the son of P, and O is the husband of P. So O is M's father, and M is O's son. The information that Q is O's granddaughter does not affect the relation between M and O.

M is a son, so 'Daughter' and 'Mother' are wrong, and 'Father' reverses the relation: O is the father, M the son.

Discuss in Forum

54.

P is the brother of D. X is the sister of P. A is the brother of F. F is the daughter of D. M is the father of X. Who is the uncle of A ?

Exam Year(s)

Tripura Public Service Commission - 2014, Tripura Public Service Commission - 2019,

Answer: B

The uncle of A is P.

Work out A's parent first. F is the daughter of D, and A is the brother of F, so A is also a child of D. P is the brother of D, so P is the brother of A's parent, that is, A's uncle.

X is the sister of P, so X is also a sibling of D and is A's aunt, not uncle. F is A's sister. M is the father of X, and so of P and D as well, which makes M A's grandfather.

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55.

'X' is the wife of 'Y' and 'Y' is the brother of 'Z', 'Z' is the son of 'P'. How is 'P' related to 'X' ?

A.Sister
B.Brother
C.Grand Father
D.None of these

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: D

P's relation to X is not among the options, so the answer is None of these.

Z is the son of P, and Y is the brother of Z, so Y is also a child of P. X is the wife of Y, so P is X's father-in-law or mother-in-law, depending on P's gender, which the question does not state.

P belongs to the generation above X, so P cannot be X's sister or brother. Nothing makes P a grandparent either: P is the parent of X's husband, not of X's parent. With no option naming a parent-in-law, 'None of these' is right.

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56.

A is father of C and D is son of B. E is brother of A. If C is sister of D, how is B related to E ?

A.Sister-in-Law
B.Brother
C.Brother-in-Law
D.Sister.

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: A

B is E's Sister-in-Law.

C is a sister of D, so C and D are siblings. A is the father of C, and D is the son of B, so B is the other parent of the same children: B is A's wife, C and D's mother.

E is the brother of A. The wife of one's brother is one's sister-in-law, so B is E's sister-in-law.

B cannot be E's brother or brother-in-law, because as the children's mother B is female, and B is not E's sister, since B is related to E only by marriage.

Discuss in Forum

57.

Pointing to a woman in a group photograph Rita said, "Her sister's father is the only son of my grandfather." How is Rita related to woman in the photograph ?

A.Mother
B.Aunt
C.Sister
D.Mother-in-law

Exam Year(s)

Tripura Public Service Commission - 2014,

Answer: C

The woman is Rita's sister.

Work from the end of Rita's statement. The only son of Rita's grandfather is Rita's father. So the woman's sister's father is Rita's father, which means the woman herself is a daughter of Rita's father.

The woman and Rita therefore share a father, so the woman is Rita's sister. Nothing places her a generation above Rita, which rules out 'mother' and 'aunt', and nothing suggests a marriage, which rules out 'mother-in-law'.

Discuss in Forum

58.

A is the brother of B, C is the father of D, E is the mother of B. A and D are brothers. How E relates to C?

A.Niece
B.Sister
C.Aunty
D.Wife

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: D

E is C's Wife.

A is B's brother and A and D are brothers, so A, B and D are siblings. E is B's mother, so she is the mother of all three; C is D's father, so he is the father of all three. The mother and father of the same children are husband and wife.

Niece, sister and aunt would each place E outside the parent generation, which the facts rule out.

Drawing a quick family tree, with C and E above A, B and D, makes the relation obvious.

Discuss in Forum

59.

A's mother is sister of B and she has a daughter C, who is 21 years old. How is B related to C?

A.Father
B.Maternal uncle
C.Uncle
D.Daughter

Exam Year(s)

Tripura Public Service Commission - 2025,

Answer: B

B is C's maternal uncle.

A's mother is B's sister, and C is her daughter. So C is the daughter of B's sister, and B is the brother of C's mother, which makes B C's maternal uncle (the question treats B as male).

B cannot be C's father, since C's mother is B's sister. 'Uncle' alone is less precise than 'maternal uncle', which names the mother's side, and 'daughter' is not a relation B can have to C here.

Discuss in Forum

60.

Pointing to a woman, Ramesh said, "She is the daughter of the only son of my mother." How is the woman related to Ramesh ?

A.Sister
B.Daughter
C.Niece
D.Cousin

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: B

The woman is Ramesh's Daughter.

The only son of Ramesh's mother is Ramesh himself (Ramesh being a man's name), so 'the daughter of the only son of my mother' is the daughter of Ramesh.

She would be his sister only if she were his mother's daughter, his niece if she were a sibling's daughter, and his cousin if she were the child of his parent's sibling. The phrase 'only son' rules all of those out.

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