The pressure drop in tower should be between _____ N/m2 per meter of tower height to prevent flooding?

The pressure drop in tower should be between _____ N/m2 per meter of t

1.	The pressure drop in tower should be between _____ N/m² per meter of tower height to prevent flooding?
A.	100 to 200
B.	200 to 300
C.	200 to 400
D.	400 to 500
Answer» D. 400 to 500