Task: Question Answering
Input (English): Problem: a contractor undertook to do a piece of work in 10 days . he employed certain number of laboures but 5 of them were absent from the very first day and the rest could finish the work in only 13 days . find the number of men originally employed ? 
Options: a ) 21.6 , b ) 23.6 , c ) 22.6 , d ) 21.8 , e ) 21.3
Output (English): a