As per Mines Act 1952, the periods of work of any adult employee above ground shall not be more than "A" hours along with his interval for rest and he shall not work for more than "B" hrs continuously before he has had an interval of rest for at least 30 minutes. A and B are given by

A. 9 & 1

B. 8 & 2

C. 12 & 5

D. 14 & 6

Answer: Option C