Task: Question Answering
Input (English): Problem: 10 men can complete a work in 7 days . but 10 women need 14 days to complete the same work . how many days will 5 men and 10 women need to complete the work ? 
Options: a ) 5 , b ) 6 , c ) 7 , d ) 8 , e ) 10
Output (English): c