Task: Question Answering
Input (English): Problem: a boatman can row 96 km downstream in 8 hr . if the speed of the current is 4 km / hr , then find in what time will be able to cover 8 km upstream ? 
Options: a ) 6 hr , b ) 2 hr , c ) 4 hr , d ) 1 hr , e ) none of these
Output (English): b