Task: Question Answering
Input (English): Problem: if a man walks at a rate of 10 kmph , he misses a train by 14 minutes . however , if he walks at the rate of 12 kmph , he reaches the station 10 minutes before the arrival of the train . find the distance covered by him to reach the station . 
Options: a ) 6 , b ) 15 , c ) 12 , d ) 4 , e ) 8
Output (English): a