Task: Question Answering
Input (English): Problem: 35 liters of a mixture is created by mixing liquid p and liquid q in the ratio 4 : 3 . how many liters of liquid q must be added to make the ratio 5 : 7 ? 
Options: a ) 10 , b ) 11 , c ) 12 , d ) 13 , e ) 14
Output (English): d