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'.

Example Input: Problem: john and jane went out for a dinner and they ordered the same dish . both used a 10 % discount coupon . john paid a 15 % tip over the original price of the dish , while jane paid the tip over the discounted price for the coupon . if john paid $ 0.63 more than jane , what was the original price of the dish ? 
Options: a ) 24 , b ) 34.8 , c ) 37.8 , d ) 42 , e ) 84
Example Output: d

Example Input: Problem: a person borrows rs . 5000 for 2 years at 4 % p . a . simple interest . he immediately lends it to another person at 8 % p . a for 2 years . find his gain in the transaction per year . 
Options: a ) 167.5 , b ) 150 , c ) 200 , d ) 112.5 , e ) 212.5
Example Output: c

Example Input: Problem: find the compound interest on $ 1200 for 4 years at 20 % p . a . if ci is component yearly ? 
Options: a ) $ 120 , b ) $ 150 , c ) $ 1288 , d ) $ 250 , e ) $ 300
Example Output:
c