Discussion
Deficiency of vitamin 'X' causes bleeding of gums. This vitamin is essential for absorption of mineral 'Y' and 'X' is found in food 'Z'. Identify X, Y and Z.
Answer: B
X, Y and Z are vitamin C, iron and citrus fruits.
Bleeding gums are a sign of scurvy, the deficiency disease of vitamin C. Vitamin C helps the body absorb iron from plant foods, and it is plentiful in citrus fruits such as oranges, lemons and amla.
The other combinations do not fit the symptom. Vitamin D deficiency causes rickets (it aids calcium absorption). Vitamin A deficiency causes night blindness. The B vitamins cause conditions such as beriberi, not bleeding gums.
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