Task: Question Answering
Input (English): Problem: at a time a , do 20 % less work than b . if a do any work in 15 / 2 hour , then in how many hour b will finish work ? 
Options: a ) 5 hour , b ) 11 / 2 hour , c ) 6 hour , d ) 13 / 2 hour , e ) 8 hour
Output (English): c