Task: Question Answering
Input (English): Problem: calculate how long it will take a swimmer to swim a distance of 12 km against the current of a river which flows at 1.2 km / hr , given that he can swim in still water at 5 km / h 
Options: a ) 3.26 , b ) 3.16 , c ) 2.34 , d ) 3.98 , e ) 3.17
Output (English): b