In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: the value of a machine depreciates at 20 % per annum . if its present value is rs . 1 , 50,000 , at what price should it be sold after two years such that a profit of rs . 24,000 is made ? 
Options: a ) 328897 , b ) 120000 , c ) 877888 , d ) 277768 , e ) 188871

Output: b


Input: Consider Input: Problem: a can complete a certain job in 19 days . b is 90 % more efficient than a . in how many days can b complete the same job ? 
Options: a ) 6 , b ) 6.25 , c ) 7 , d ) 7.5 , e ) 10

Output: e


Input: Consider Input: Problem: the banker ' s gain of a certain sum due 2 years hence at 10 % per annum is rs . 24 . the present worth is 
Options: a ) rs . 480 , b ) rs . 520 , c ) rs . 600 , d ) rs . 960 , e ) none


Output: c