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

List - I	List - II
(a) Lenticles	(i) Phellogen
(b) Cork cambium	(ii) Suberin deposition
(c) Secodnary 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 matching between List - I and List - II step-by-step based on the secondary growth in woody plants:

(a) Lenticles match with (iii) Exchange of gases:
Lenticels are lens-shaped openings formed in the bark of woody plants. They permit the exchange of gases between the outer atmosphere and the internal tissues of the stem.

(b) Cork cambium matches with (i) Phellogen:
Cork cambium is the meristematic tissue responsible for secondary growth in the outer cortical region. It is botanically known as phellogen.

(c) Secondary cortex matches with (iv) Phelloderm:
The cells cut off on the inner side by the cork cambium (phellogen) differentiate into parenchymatous cells called the secondary cortex or phelloderm.

(d) Cork matches with (ii) Suberin deposition:
The cells cut off on the outer side by the phellogen differentiate into cork or phellem. The cell walls of cork cells become heavily impregnated with a waxy, waterproof substance called suberin, making them impervious to water.

Combining these matches, we get:
a ⇒ (iii)
b ⇒ (i)
c ⇒ (iv)
d ⇒ (ii)