Task: Question Answering
Input (English): Problem: a man ' s speed with the current is 15 km / hr and the speed of the current is 2.5 km / hr . the man ' s speed against the current is 
Options: a ) 8.5 km / hr , b ) 9 km / hr , c ) 10 km / hr , d ) 12.5 km / hr , e ) none
Output (English): c