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: what will be the cost of building a fence around a rectangular plot with area equal to 289 sq ft , if the price per foot of building the fence is rs . 50 ? 
Options: ['a ) a ) rs . 3944', 'b ) b ) rs . 3948', 'c ) c ) rs . 3519.5', 'd ) d ) rs . 3949', 'e ) e ) rs . 3923']
Example Output: c

Example Input: Problem: the area of a triangle will be when a = 2 m , b = 5 m , c = 7 m , a , b , c being lengths of respective sides ? 
Options: a ) 2 , b ) 7 , c ) 5 , d ) 3 , e ) 4
Example Output: b

Example Input: Problem: the surface of a cube is 150 sq cm . find its volume ? 
Options: a ) 8 cc , b ) 9 cc , c ) 125 cc , d ) 4 cc , e ) 6 cc
Example Output:
c