Akash earns Rs. per week. Let be the price per unit of food and be the price per unit of any other good . He can use food coupons to buy food at a subsidized rate of (1) per unit, (0,1), and this subsidy can be availed only upto the amount of food. For any additional purchase beyond he has to pay the full market price. If his weekly income is greater than (1) , then the maximum amount of food that he can buy per week is

A) (/) + (B) (/ )+ (C) [/(1)] + (D) [/(1)]+

The answer is B. Please show the working.