A human body has a surface area of approximately  1 m2. The normal body temperature is 10 K above the surrounding room temperature  T0. Take the room temperature to be  T0=300 K. For T0=300 K, the value of σT04=460 Wm−2 ( where σ is the Stefan Boltzmann constant). Which of the following options is/are correct? Assume human beings to be black body.

(A) is clearly wrong from Wien’s displacement law.(B)  For black body e=1 Initial radiated power :  W1=σAT4−T04Final radiated power : W2=σAT4−T0−ΔT04Extra power radiated : W2−W1=4σAT03ΔT0 (C) For black body e=1 W2−W1=4σAT03ΔT0=4×460300×10=61 J in 1secAs human body is not a black body , Options (B) and (C) are wrong.(D) True, by reducing area, net power emitted is reduced while his body will produce same heat inside so will be easy to maintain temperature.