Task: Question Answering
Input (English): Problem: the ration of the number of boys and girls in a college is 7 : 8 . if the percentage is increase in the number of boys and girls be 20 % and 10 % respectively . what will be the new ration ? 
Options: a ) 5 : 7 , b ) 15 : 21 , c ) 21 : 22 , d ) 13 : 17 , e ) 23 : 42
Output (English): c