A group of people has provisions for 29 days for 24 men. If after 4 days 1/6 of them desert then food will last for?

A group of people has provisions for 29 days for 24 men. If after 4 days 1/6 of them desert then food will last for?

A. 25 days
B. 28 days
C. 30 days
D. 32 days