In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: what is 50 % of 40 % of 1200 grams ? 
Options: a ) 450 gms , b ) 100 gms , c ) 300 gms , d ) 240 gms , e ) none of these

Output: d


Input: Consider Input: Problem: a shopkeeper sells his goods at cost price but uses a faulty meter that weighs 800 grams . find the profit percent . 
Options: a ) 20 , b ) 15 , c ) 25 , d ) 18 , e ) 19

Output: c


Input: Consider Input: Problem: the population of a village is 15540 . it increases annually at the rate of 28 % p . a . what will be its population after 2 years ? 
Options: a ) 10000 , b ) 25460 , c ) 26709 , d ) 14000 , e ) 14400


Output: b