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: a watch was sold at a loss of 21 % . if it was sold for rs . 140 more , there would have been a gain of 4 % . what is the cost price ?
Options: a ) 560 , b ) 882 , c ) 799 , d ) 778 , e ) 901

Output: a

Input: Consider Input: Problem: the cost price of a radio is rs . 4800 and it was sold for rs . 4400 , find the loss % ?
Options: a ) 8 , b ) 9 , c ) 7 , d ) 6 , e ) 4

Output: a

Input: Consider Input: Problem: a shopkeeper sold 30 articles at the cost price of 35 articles . then find the profit % or lost %
Options: a ) 12 % , b ) 15 % , c ) 16.67 % , d ) 18 % , e ) 22 %
Output: c