Task: Question Answering
Input (English): Problem: two trains of length 100 m and 200 m are 100.00001 m apart . they start moving towards each other on parallel tracks , at speeds 108 kmph and 72 kmph . in how much time will the trains cross each other ? 
Options: a ) 8 , b ) 7 , c ) 9 , d ) 2 , e ) 1
Output (English): a