What constitutes the cambial ring?

Assertion: Cambium is a lateral meristem and causes growth in width.
Reason: Cambium is made up of fusiform and ray initials in the stem.

In the stems of trees,the conduction of water takes place mainly through........

Arrange the following in the sequence you would find them in a plant starting from the periphery: phellem,phellogen,phelloderm.

Vascular cambium is a meristematic layer that cuts off:

Read the components $a$ to $d$ given in the note and identify the correct sequence of components from the outside to the inside of a mature stem:
$(a)$ Secondary cortex
$(b)$ Wood (Secondary xylem)
$(c)$ Secondary phloem
$(d)$ Phellem (Cork)