The power required to operate the heat pump is

Question

A Carnot heat pump is used to heat a house. The outside temperature is -3⁰C and the indoor temperature is 27⁰C. If the heat loss from the house is 40kW, the power required to operate the heat pump is

(A) 1kW                            (B) 2kW

(C) 3kW                            (D) 4kW