The following figure showing seondary growth in dicot stem. Identify A, B, C,D, E and F

Options

A. A – Phellem, B – Phellogen, C – Cambium ring, D – Secondary xylem, E – Secondary phloem, F – Medullary rays
B. A – Phellogen, B – Phellem, C – Medullary rays, D – Secondary xylem, E – Secondary phloem, F – Cambium ring
C. A – Phellem, B – Phellogen, C – Medullary rays, D – Secondary phloem, E – Secondary xylem, F – Cambium ring
D. A – Phellem, B – Phellogen, C – Medullary rays, D – Secondary xylem, E – Secondary phloem, F – Cambium ring

Answer

D

Explanation

The cork cambium is a secondary lateral meristem which develops from permanent tissues in the region of epidermis, hypodermis, cortex or even in outer layers of phloem. It produces dead cells or cork (phellem) towards outer side and living phelloderm towards inner side.