ANS:A - is greater than

At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid is generally greater than that in a dry packed tower. The irrigation of liquid in a packed tower adds additional resistance to the flow of gas through the packed bed. This additional resistance results in a higher pressure drop compared to a dry packed tower, where no liquid is present. The presence of liquid increases the effective cross-sectional area available for gas flow, but it also introduces additional drag forces due to the interaction between the liquid and gas phases. As a result, the pressure drop in a packed tower with liquid irrigation is typically greater than that in a dry packed tower. So, the correct option is: "is greater than."