Task: Question Answering
Input (English): Problem: when a mobile is sold for rs . 7200 , the owner loses 20 % . at what price must that mobile be sold in order to gain 20 % ? 
Options: a ) 10,400 , b ) 10,600 , c ) 10,800 , d ) 11,000 , e ) 11,200
Output (English): c