Task: Question Answering
Input (English): Problem: one train is travelling 45 kmph and other is at 10 meters a second . ratio of the speed of the two trains is ? 
Options: a ) 3 : 3 , b ) 5 : 7 , c ) 5 : 4 , d ) 7 : 2 , e ) 8 : 5
Output (English): c