Q. Pick out the wrong statement.

• (A) Heat transfer by radiation can not occur across an absolute volume
• (B) In case of a shell and tube heat exchanger, the pressure drop through the shell is proportional to the number of times the fluid crosses the bundle between baffles
• (C) Propagation velocity for travel of heat radiation through vacuum is equal to the velocity of the light
• (D) The amount of heat involved in the condensation or vaporisation of 1 kg of a fluid is the same