The incomes of A, B and C are in the ratio 3 : 7 : 4 and their expenses in the ratio 4 : 3 : 5. If A saves Rs. 300 out of an income of Rs. 2,400, the savings of B and C are A, B और C की आय 3: 7: 4 के अनुपात में है और उनका खर्च 4: 3: 5 के अनुपात में है। यदि A एक 2400 रु. की आय में से 300 रु. की बचत करता है, B और C की बचत है

A saves Rs. 300 from income Rs. 2400, so A's expense = 2400 - 300 = 2100. Income ratio is 3:7:4, expenses ratio is 4:3:5. If A's income (3 parts) = 2400, then 1 part = 800. B's income (7 parts) = 7×800 = 5600. B's expense (3 parts) = (3/4)×2100 = 1575. So B saves 5600 - 1575 = Rs. 4025. C's income (4 parts) = 4×800 = 3200. C's expense (5 parts) = (5/4)×2100 = 2625. So C saves 3200 - 2625 = Rs. 575. Option A matches these values.