Pick out the wrong statement ?

Process Equipment and Plant Design 24/04/2020

A. Plate efficiency increases with increase in superficial vapour velocity till entrainment limit
B. Increase in depth of the liquid about the slots increases the plate efficiency, particularly if the liquid depth is < 1"
C. Too small a plate spacing can cause a low efficiency, if the vapour velocity is greater than the allowable value
D. None of these

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