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: in arun ’ s opinion , his weight is greater than 65 kg but less than 72 kg . his brother doest not agree with arun and he thinks that arun ’ s weight is greater than 60 kg but less than 70 kg . his mother ’ s view is that his weight can not be greater than 68 kg . if all are them are correct in their estimation , what is the average of different probable weights of arun ? 
Options: a ) 66 kg , b ) 67 kg , c ) 68 kg , d ) 69 kg , e ) none of these

Ex Output:
b


Ex Input:
Problem: 8 ^ 100 is divisible by 17 . find the remainder ? 
Options: a ) 10 , b ) 12 , c ) 16 , d ) 18 , e ) 20

Ex Output:
c


Ex Input:
Problem: the average age of a , b and c is 29 years . if the average age of a and c is 32 years , what is the age of b in years ? 
Options: a ) 19 , b ) 35 , c ) 20 , d ) 32 , e ) 23

Ex Output:

e