Task: Question Answering
Input (English): Problem: a man can row downstream at the rate of 16 km / hr and upstream at 8 km / hr . find man ' s rate in still water and the rate of current ? 
Options: a ) 12,4 , b ) 6,3 , c ) 9,3 , d ) 6,6 , e ) none of these
Output (English): a