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'.

Ex 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

Ex Output:
b

Ex Input:
Problem: at a particular graduation party with 300 guests , 70 % of the guests brought gifts , and 40 % of the female guests brought gifts . if 15 males did not bring gifts to the party , how many females did bring gifts ?
Options: a ) 18 , b ) 28 , c ) 50 , d ) 68 , e ) 70

Ex Output:
c

Ex Input:
Problem: the manufacturing cost of a shoe is rs . 180 and the transportation lost is rs . 500 for 100 shoes . what will be the selling price if it is sold at 20 % gains
Options: a ) rs 222 , b ) rs 216 , c ) rs 220 , d ) rs 210 , e ) rs 217

Ex Output:
a