Task: Question Answering
Input (English): Problem: the compound ratio of 5 : 6 , 3 : 2 and 4 : 5 ? 
Options: a ) 1 : 8 , b ) 1 : 6 , c ) 1 : 2 , d ) 1 : 1 , e ) 1 : 7
Output (English): d