ANS:C - Heating of humid air is done for its dehumidification.

Heating of humid air can indeed be done for dehumidification, but the statement is somewhat misleading or incomplete. Let's delve into this further: When air is heated, its relative humidity decreases, meaning the air can hold more moisture. This is because warm air has a higher capacity to hold moisture compared to cold air. Therefore, heating humid air can effectively reduce its relative humidity, which is a key aspect of dehumidification. However, simply heating humid air may not always lead to dehumidification in practical applications. For effective dehumidification, the air needs to be heated and then cooled again to remove the excess moisture. This process is known as heating, ventilation, and air conditioning (HVAC) or air conditioning, where the air is typically heated first to increase its capacity to hold moisture, then cooled to condense and remove the excess moisture. So, while heating humid air can be a step in the dehumidification process, it's often part of a more comprehensive air conditioning or HVAC system that involves both heating and subsequent cooling to achieve the desired dehumidification. Therefore, the statement "Heating of humid air is done for its dehumidification" might be more accurate if it includes the subsequent cooling step.