Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.$?

Minimum diameter of the tube used for making water manometer should be

1.	Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.$?
A.	1
B.	2.5
C.	4
D.	6
Answer» E.