A Shell and Tube condenser is a common type of water-cooled condenser used in large refrigeration and air conditioning systems.
In this design, the refrigerant flows through the space inside the shell around the tubes.
The cooling water flows inside the tubes and absorbs heat from the refrigerant.
Heat is transferred from the hot refrigerant to the cooler water flowing through the tubes, causing the refrigerant to condense.
So, the refrigerant is in the shell and water flows through the tubes — not the other way around.
Air is not used in a shell and tube condenser.
Therefore, option (B) is correct.