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: 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: if a ( a - 2 ) = 2 and b ( b - 2 ) = 2 , where a = b , then a + b =
Options: a ) 1 , b ) 2 , c ) 4 , d ) 46 , e ) 48

Ex Output:
a

Ex Input:
Problem: there are 2 sections a and b in a class , consisting of 16 and 14 students respectively . if the average weight of section a is 20 kg and that of section b is 25 kg , find the average of the whole class ?
Options: a ) 33.5 kg , b ) 37.25 kg , c ) 42.45 kg , d ) 55.12 kg , e ) 29.78 kg

Ex Output:
a