Water impermeable, waxy material secreted by endodermal cells is called
a)	Lignin	b)	Suberin	c)	Conjuctive tissue	d)	Pectin

(b)

Suberin.

The innermost layer of cortex is called endodermis. It comprises a single layer of barrel-shaped cells without any intercellular spaces. The tangential  as well as radial walls of the endodermal cells have a deposition of water impermeable, waxy material called suberin in the form of casparian strips