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'.

[EX Q]: Problem: sheela deposits rs . 4500 in bank savings account . if this is 28 % of her monthly income . what is her monthly income in ? 
Options: a ) 22000 , b ) 27000 , c ) 16071 , d ) 16789 , e ) none of these
[EX A]: c

[EX Q]: Problem: after decreasing 40 % in the price of an article costs rs . 1050 . find the actual cost of an article ? 
Options: a ) 1200 , b ) 1750 , c ) 1050 , d ) 1570 , e ) 1005
[EX A]: b

[EX Q]: Problem: a sum fetched a total simple interest of rs . 2700 at the rate of 6 p . c . p . a . in 3 years . what is the sum ? 
Options: a ) 25000 , b ) 20000 , c ) 18000 , d ) 14000 , e ) 15000
[EX A]:
e