One factor responsible for water rise up to 100 m of tall plant, is
a)	Root pressure	b)	Transpiration pull	c)	Pulsation	d)	Diffusion

(b)

The most accepted theory of ascent of sap is transpiration pull theory or cohesion-tension theory proposed by Dixon and Jolly. Loss of water from mesophyll cells of leaf through transpiration creates transpiration pull or tension, which is transmitted downward and is relieved when water is absorbed through roots.