A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case,

• A. the cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant.
• B. both the spheres will emit equal amount of radiation per unit time in the beginning.
• C. both will absorb equal amount of radiation from the surrounding in the beginning.
• D. both(b) & (c).