The correct answer is C. Viscosity.
Poise is the unit of dynamic viscosity, which is a measure of a fluid’s resistance to flow. It is defined as the ratio of the shear stress to the rate of shear strain.
Surface tension is the force that acts at the surface of a liquid, causing it to behave as if it were covered by an elastic skin. It is caused by the attraction between the molecules of the liquid.
Capillarity is the ability of a liquid to flow in narrow spaces without the assistance of, and in opposition to external forces like gravity. It is caused by the adhesion of the liquid to the walls of the space.
Shear stress is the force per unit area that acts parallel to a surface. It is caused by the relative motion of two adjacent layers of a fluid.