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: an inspector rejects 15 % of the meters as defective . how many will he examine to reject 10 ?
Options: a ) a ) 100 , b ) b ) 66.7 , c ) c ) 250 , d ) d ) 200 , e ) e ) 160
Example Output: b

Example Input: Problem: i gain 70 paise on rs . 70 . my gain percent is :
Options: a ) 0.1 % , b ) 1 % , c ) 7 % , d ) 10 % , e ) noneof these
Example Output: b

Example Input: Problem: a small college reduced its faculty by approximately 13 percent to 195 professors . what was the original number of faculty members ?
Options: a ) 182 , b ) 208 , c ) 224 , d ) 254 , e ) 302
Example Output:
c