Step 1: Vitamin C indeed cannot be stored in the body (Assertion TRUE) — it must be consumed regularly in the diet.

Step 2: However, the Reason is factually wrong: Vitamin C is water-soluble, not fat-soluble. It is precisely because it is water-soluble that any excess is readily excreted in urine rather than stored in fatty tissue (unlike fat-soluble vitamins A, D, E, K, which CAN be stored in the body). The Reason's claim that Vitamin C is 'fat soluble' is FALSE.

Correct option: (c) Assertion (A) is true, but Reason (R) is false.