Task: Question Answering
Input (English): Problem: a can do a work in 6 days, b can do a work in 8 days and c can do it in 12 days. b left work after 5 days. for how many number of days should a and c should work together to complete the remaining work ?
Options: a. 1 / 2, b. 2 / 3, c. 3 / 4, d. 4 / 3, e. 5 / 2
Output (English): b