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

To solve the matching problem we compare each term in List‑I with the most appropriate description in List‑II.

1. (a) Lenticles – Lenticles are small openings in the bark that allow gases such as oxygen and carbon dioxide to diffuse between the interior of the stem and the external environment. Therefore, they are correctly matched with (iii) Exchange of gases.

2. (b) Cork cambium – The cork cambium, also known as phellogen, is a lateral meristem that produces the protective outer layers of the bark (cork and phelloderm). Hence, it pairs with (i) Phellogen.

3. (c) Secondary cortex – The secondary cortex, which forms inside the cork layer, is called the phelloderm. It is a living tissue that lies just beneath the cork. Consequently, it matches with (iv) Phelloderm.

4. (d) Cork – Cork is the dead, suberized tissue that the cork cambium (phellogen) secretes to the outside. The presence of suberin makes cork waterproof and resistant to pathogens, so it corresponds to (ii) Suberin deposition.

Putting all the correct pairs together gives the final answer: (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii).