Assertion (A) : If selling price of an article is ₹ 400 gaining of its C.P., then gain% = 25%. Reason (R) : Loss = . 1. Both A and R are correct, and R is the correct explanation for A. 2. Both A and R are correct, and R is not the correct explanation for A. 3. A is true, but R is false. 4. A is false, but R is true.