Aruna has only ₹ 1 and ₹ 2 coins with her. If the total number of coins that she has is 50 and the amount of money with her is ₹ 75, then find the number of ₹ 1 and ₹ 2 coins respectively. (a) 35 and 15 (b) 35 and 20 (c) 15 and 35 (d) 25 and 25