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

Example Input: Problem: find the area of trapezium whose parallel sides are 28 cm and 18 cm long , and the distance between them is 15 cm . 
Options: a ) 227 , b ) 299 , c ) 345 , d ) 161 , e ) 212
Example Output: c

Example Input: Problem: find the length of the wire required to go 15 times round a square field containing 69696 m 2 . 
Options: a ) 15840 , b ) 15848 , c ) 15828 , d ) 27892 , e ) 22892
Example Output: a

Example Input: Problem: if 10 spiders make 5 webs in 5 days , then how many days are needed for 1 spider to make 1 web ? 
Options: a ) 10 , b ) 9 , c ) 5 , d ) 15 , e ) 20
Example Output:
a