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

Example Input: Problem: the diagonals of a rhombus are 13 cm and 20 cm . find its area ? 
Options: a ) 176 , b ) 130 , c ) 150 , d ) 179 , e ) 172
Example Output: b

Example Input: Problem: a snooker tournament charges $ 45.00 for vip seats and $ 15.00 for general admission ( “ regular ” seats ) . on a certain night , a total of 300 tickets were sold , for a total cost of $ 7,500 . how many fewer tickets were sold that night for vip seats than for general admission seats ? 
Options: a ) 212 , b ) 240 , c ) 220 , d ) 230 , e ) 225
Example Output: c

Example Input: Problem: nitin ' s age was equal to square of some number last year and the following year it would be cube of a number . if again nitin ' s age has to be equal to the cube of some number , then for how long he will have to wait ? 
Options: ['a ) 10 years', 'b ) 38 years', 'c ) 39 years', 'd ) 64 years', 'e ) 44 years']
Example Output:
b