Task: Question Answering
Input (English): Problem: if a man walks at a rate of 5 kmph , he misses a train by 7 minutes . however , if he walks at the rate of 6 kmph , he reaches the station 5 minutes before the arrival of the train . find the distance covered by him to reach the station . 
Options: a ) 8 , b ) 4 , c ) 15 , d ) 6 , e ) 12
Output (English): d