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: the ratio of efficiency of a is to c is 5 : 3 . the ratio of no . of days taken by b is to c is 2 : 3 . a takes 6 days less than c , when a and c completes the work individually . b and c left the work after 2 days . the no of days taken by a to finish the remaining work ?
Options: a ) 4.5 , b ) 5 , c ) 6 , d ) 7 , e ) 8

Output: c

Input: Consider Input: Problem: a can finish a piece of work in 12 days . b can do it in 20 days . they work together for 9 days and then a goes away . in how many days will b finish the work ?
Options: a ) 6 days , b ) 4 days , c ) 5 days , d ) 3 days , e ) 7 days

Output: c

Input: Consider Input: Problem: if the l . c . m of two numbers is 750 and their product is 18750 , find the h . c . f of the numbers
Options: a ) 23 , b ) 28 , c ) 48 , d ) 25 , e ) 99
Output: d