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A and B are brothers. R is father of B. S is the brother of X and maternal uncle of A. Which of the following X could be to R?

  • A.Wife
  • B.Mother
  • C.Brother
  • D.Uncle

Answer: A

X could be R's wife.

S is the maternal uncle of A, so S is the brother of A's mother. S is also the brother of X, so X is A's mother (X must be a woman, since a maternal uncle is the mother's brother).

A and B are brothers and R is B's father, so R is also A's father. A's mother X is therefore the wife of A's father R.

'Mother' would make X the grandmother of A, but X is A's mother. 'Brother' and 'Uncle' are male, while X, as A's mother, must be female.

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