Casparian strips are found in (a) epidermis (b) hypodermis (c) periderm (d) endodermis.
Option D Endodermis is single layered structure which separates cortex from stele. The cells of endodermis are barrelshaped without intercellular spaces, living and containing starch. The radial and tangential walls of endodermal cells possess thickenings of lignin, suberin and cutin in the form of strips or bands, which are known as casparian bands or casparian strips
