Task: Question Answering
Input (English): Problem: if 4 people are selected from a group of 9 married couples , what is the probability that none of them would be married to each other ? 
Options: a ) 1 / 33 , b ) 2 / 85 , c ) 1 / 3 , d ) 56 / 85 , e ) 11 / 85
Output (English): d