In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Ex Input:
Problem: the greatest number which on dividing 1657 and 2037 leaves remainders 10 and 7 respectively , is : 
Options: a ) 123 , b ) 1 , c ) 235 , d ) 305 , e ) 505

Ex Output:
b


Ex Input:
Problem: a number when divided by a certain divisor left remainder 241 , when twice the number was divided by the same divisor , the remainder was 115 . find the divisor ? 
Options: a ) 370 , b ) 365 , c ) 380 , d ) 367 , e ) 460

Ex Output:
d


Ex Input:
Problem: x varies inversely as square of y . given that y = 3 for x = 1 . the value of x for y = 5 will be equal to : 
Options: a ) 3 , b ) 6 , c ) 1 / 9 , d ) 1 / 3 , e ) 9 / 25

Ex Output:

e