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: the population of a town is 30000 . it decreases annually at the rate of 20 % p . a . what will be its population after 2 years ?
Options: a ) 4300 , b ) 19200 , c ) 5120 , d ) 5230 , e ) 5366

Output: b

Input: Consider Input: Problem: at what rate percent of simple interest will a sum of money double itself in 22 years ?
Options: a ) 6.54 % , b ) 4.54 % , c ) 8 . 2 % , d ) 4.94 % , e ) 5.54 %

Output: b

Input: Consider Input: Problem: a sum was put a simple interest at a certain rate for 7 years . had it been put at 2 % higher rate , it would have fetched rs . 350 more . the sum is :
Options: a ) s . 500 , b ) s . 1000 , c ) s . 1500 , d ) s . 2000 , e ) s . 2500
Output: a