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 , b and c rents a pasture for rs . 1073 . a put in 12 horses for 8 months , b 16 horses for 9 months and 18 horses for 6 months . how much should c pay ?
Options: a ) 270 , b ) 289 , c ) 267 , d ) 255 , e ) 333

Ex Output:
e

Ex Input:
Problem: the average age of 15 students of a class is 15 years . out of these , the average age of 8 students is 14 years and that of the other 6 students is 16 years , the age of the 15 th student is
Options: a ) 17 , b ) 12 , c ) 13 , d ) 14 , e ) 15

Ex Output:
a

Ex Input:
Problem: the standard deviation of a normal distribution of data is 2 , and 3 standard deviations below the mean is greater than 46 . what is a possible value for the mean of the distribution ?
Options: a ) 46 , b ) 52 , c ) 48 , d ) 49 , e ) 50

Ex Output:
b