Pick out the wrong statement pertaining to the design of the distillation column?

A. idue build up

B. Generally, a skirt clearance of 0.5? to 1.5? is recommended to prevent plugging of the slots by

C. The purpose of the slot is to disperse the gas into the liquid in the form of small bubbles

D. If sufficient slot area is not provided, the gas may pass through the skirt clearance