The temperature inside a refrigerator is `t_2` °C and the room temperature is `t_1` °C. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be

Options

A. frac{t_2+271}{t_1-t_2}`
B. frac{t_1-t_2}{t_1+271}`
C. frac{t_1}{t_1-t_2}`
D. frac{t_1+273}{t_1-t_2}`