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: alex takes a loan of $ 4,000 to buy a used truck at the rate of 6 % simple interest . calculate the annual interest to be paid for the loan amount .
Options: a ) 680 , b ) 700 , c ) 240 , d ) 620 , e ) 260
[A]: c

[Q]: Problem: an article is bought for rs . 560 and sold for rs . 340 , find the loss percent ?
Options: a ) 36 % , b ) 38 % , c ) 16 % , d ) 39 % , e ) 12 %
[A]: d

[Q]: Problem: an escalator moves towards the top level at the rate of 12 ft . sec and its length is 150 feet . if a person walks on the moving escalator at the rate of 3 feet per second towards the top level , how much time does he take to cover the entire length .
Options: a ) 10 sec , b ) 20 sec , c ) 15 sec , d ) 16 sec , e ) 14 sec
[A]:
a