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: a dishonest dealer professes to sell goods at the cost price but uses a weight of 990 grams per kg , what is his percent ? 
Options: a ) 1.01 % , b ) 25 % , c ) 22 % , d ) 29 % , e ) 45 %

Output: a


Input: Consider Input: Problem: 120 students represent x percent of the boys at a school . if the boys at the school make up 30 % of the total school population of x students , what is x ? 
Options: a ) 120 , b ) 150 , c ) 180 , d ) 200 , e ) 250

Output: d


Input: Consider Input: Problem: two numbers are less than third number by 30 % and 37 % respectively . how much percent is the second number less than by the first 
Options: a ) 8 % , b ) 10 % , c ) 9 % , d ) 11 % , e ) 12 %


Output: b