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'.

Input: Consider Input: Problem: two trains of equal lengths take 10 sec and 8 sec respectively to cross a telegraph post . if the length of each train be 120 m , in what time will they cross other travelling in opposite direction ? 
Options: a ) 22 , b ) 12 , c ) 9 , d ) 99 , e ) 21

Output: c


Input: Consider Input: Problem: if 8 men or 12 women can do a piece of work in 20 days , in how many days can the same work be done by 6 men and 11 women ? 
Options: a ) 10 days , b ) 11 days , c ) 12 days , d ) 15 days , e ) 17 days

Output: c


Input: Consider Input: Problem: if one cat eats 1.5 rats in 1.5 days , then in howmany days 3 cats will eat 3 rats ? ? 
Options: a ) 1 day , b ) 2 days , c ) 3 days , d ) 4 days , e ) 5 days


Output: a