JEE Advanced levelSingle correct optionDifficulty 3 of 3bm133
Assertion (A): A person who gets very little exposure to sunlight may develop rickets (or osteomalacia in adults) even when the diet is otherwise adequate. Reason (R): Vitamin D can be synthesised in the skin on exposure to sunlight.
ABoth A and R are true but R is not the correct explanation of A
BA is true but R is false
CBoth A and R are true and R is the correct explanation of A
DA is false but R is true
Answer: C
Vitamin D is formed in the skin under UV light, so without sunlight the body relies on dietary vitamin D alone. Its deficiency causes rickets or osteomalacia. R explains A.