Task: Question Answering
Input (English): Problem: a man cheats while buying as well as while selling . while buying he takes 10 % more than what he pays for and while selling he gives 20 % less than what he claims to . find the profit percent , if he sells at 12 % below the cost price of the claimed weight . 
Options: a ) 19.81 % , b ) 21 % , c ) 37.5 % , d ) 25 % , e ) 37.5 %
Output (English): b