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'.

[Q]: Problem: if rs . 420 amount to rs . 540 in 4 years , what will it amount to in 6 years at the same rate % per annum ? 
Options: a ) s . 575 , b ) s . 595 , c ) s . 590 , d ) s . 600 , e ) s . 585
[A]: d


[Q]: Problem: if the difference between the compound interest & simple interest of a certain sum of money is rs . 72 at 12 % p . a . per two year . find the sum ( in rs . ) ? 
Options: a ) 200 / 15 , b ) 200 / 17 , c ) 220 / 17 , d ) 240 / 17 , e ) 260 / 17
[A]: b


[Q]: Problem: what is the difference between the ci on rs . 5000 for 1 years at 4 % per annum ci yearly and half yearly ? 
Options: a ) rs . 2.04 , b ) rs . 2.12 , c ) rs . 2.23 , d ) rs . 3 , e ) rs . 3.04
[A]:
a