A Carnot engine operating between temperature `T_1 and T_2` has efficiency 1/6. When `T_2` is lowered by 62K its efficiency increase to 1/3. Then `T_1 and T_2` are, respectively:
A. 372 K and310 K
B. 372 K and 330K
C. 330 K and 268 K
D. 310 K and 248 K