Step 1:Vitamin D is a fat-soluble vitamin and gets stored in the body, unlike water-soluble vitamins. Hence, Assertion (A) is correct. However, Vitamin D is not excreted from the body in urine; instead, it is stored in fat and liver. This makes Reason (R) false.
Step 2: Thus, the correct answer is option (3).
Scurvy is caused due to deficiency of:
A school is organizing a debate competition with participants as speakers and judges. $ S = \{S_1, S_2, S_3, S_4\} $ where $ S = \{S_1, S_2, S_3, S_4\} $ represents the set of speakers. The judges are represented by the set: $ J = \{J_1, J_2, J_3\} $ where $ J = \{J_1, J_2, J_3\} $ represents the set of judges. Each speaker can be assigned only one judge. Let $ R $ be a relation from set $ S $ to $ J $ defined as: $ R = \{(x, y) : \text{speaker } x \text{ is judged by judge } y, x \in S, y \in J\} $.