Task: Question Answering
Input (English): Problem: 4 men and 12 boys finish a piece of work in 4 days , 7 men and 6 boys do it in 5 days . the ratio between the efficiencies of a man and boy is ? 
Options: a ) 18 : 19 , b ) 17 : 19 , c ) 15 : 19 , d ) 18 : 14 , e ) 18 : 11
Output (English): a