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

List - I		List - II
(a)	Metamerism	(i)	Coelenterata
(b)	Canal system	(ii)	Inactive Phase
(c)	Comb Plates	(iii)	Interval between mitosis and initiation of DNA replication
(d)	Cnidoblasts	(iv)	Porifera

To find the correct match between List - I and List - II, we can analyze the biological terms and their corresponding groups or descriptions:

1. Canal system: This is a distinguishing water circulatory system found in members of the phylum Porifera (sponges). It helps in food gathering, respiratory exchange, and waste removal. Therefore, (b) matches with (iv).

2. Cnidoblasts: These are specialized stinging cells (also called cnidocytes) containing nematocysts, which are characteristic of the phylum Coelenterata (Cnidaria). They are used for defense, anchorage, and capturing prey. Therefore, (d) matches with (i).

3. Following the correct match options provided:
- (a) Metamerism matches with (iii) Interval between mitosis and initiation of DNA replication.
- (c) Comb Plates matches with (ii) Inactive Phase.

By putting all the matches together, we get:
a - (iii)
b - (iv)
c - (ii)
d - (i)