viscosity of the liquid
surface tension of the liquid
friction between the walls of the tube and the liquid
osmotic pressure of the liquid
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Viscosity or friction in fluids has nothing to do with capillarity rather it affects the speed at which a fluid flows. Capillarity is the tendency of a liquid to rise or fall in a narrow tube. This is affected by surface tension, cohesion and adhesion. So, a liquid with greater surface tension will fall in a narrow tube(eg mercury) while one with less surface tension will rise(water). The correct answer is surface tension.
B. Surface tension of the liquid.
Cohesion and adhesion as well as surface tension forces are responsible for the capillarity of liquids. Take note my school.
Surface tension is an important factor in the phenomenon of capillarity so the answer falls back to surface tension not capillary
My dear the answer is A. Because viscosity is the internal friction in a narrow tube that oppose the motion between the two wall
Arrghh!!!!! Now it's either B or C
I hate situations like this .. . What's d real n correct answer naw 
(C) is the right ans bcos it rise due 2 capillary action which is a result of internal friction btw d tube wall & liquid.
