Match List - I with List - II and choose the correct answer.

List - I		List - II
(a)	Lenticels	(i)	Phellogen
(b)	Cork cambium	(ii)	Suberin deposition
(c)	Secondary cortex	(iii)	Exchange of gases
(d)	Cork	(iv)	Phelloderm

The correct option is a - (iii) b - (i) c - (iv) d - (ii).

Let us understand the structure and functions of the periderm tissues step-by-step to match the two lists:

(a) Lenticels: These are lens-shaped openings formed in the bark of woody plants. They permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. Thus, (a) matches with (iii).

(b) Cork cambium: Also known as Phellogen, it is a meristematic tissue developed in the cortex region of plants during secondary growth, which cuts off cells on both its outer and inner sides. Thus, (b) matches with (i).

(c) Secondary cortex: Also known as Phelloderm, it consists of parenchymatous cells formed on the inner side of the cork cambium (phellogen). Thus, (c) matches with (iv).

(d) Cork: Also known as phellem, the cells of cork are dead at maturity and have suberin deposition in their cell walls, which makes them impervious to water. Thus, (d) matches with (ii).

Combining all the correct matches, we get:
a - (iii), b - (i), c - (iv), d - (ii)