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: a man can row his boat with the stream at 16 km / h and against the stream in 12 km / h . the man ' s rate is ?
Options: a ) 8 kmph , b ) 9 kmph , c ) 2 kmph , d ) 4 kmph , e ) 1 kmph
[A]: c

[Q]: Problem: the true discount on a bill due 9 months hence at 16 % per annum is rs . 150 . the amount of the bill is
Options: a ) 1200 , b ) 1764 , c ) 1400 , d ) 1354 , e ) none of these
[A]: c

[Q]: Problem: an uneducated retailer marks all his goods at 40 % above the cost price and thinking that he will still make 25 % profit , offers a discount of 25 % on the marked price . what is his actual profit on the sales ?
Options: a ) 12.50 % , b ) 13.50 % , c ) 5 % , d ) 14.50 % , e ) none
[A]:
c