Match the column-I with the column-II and find out the correct answer :
`{:("Column-I","Colum-II"),("(a) Spongocoel","(i) Arthropoda"),("(b) Dorso-ventrally flattened body"," (ii) Cnidaria "),("(c) Coelenteron cavity"," (iii) Porifera "),("(d) Chitinous exoskeleton"," (vi) Platyhelminthes "):}`

Options

A. a-iii, b-iv, c-i, d-ii
B. a-iv, b-iii, c-ii, d-i
C. a-iii, b-iv, c-ii, d-i
D. a-ii, b-iv, c-iii, d-i

Answer

To match the items in Column-I with those in Column-II, we will analyze each term in Column-I and identify the corresponding term in Column-II based on our knowledge of the animal kingdom.

### Step-by-Step Solution:

1. **Identify "Spongocoel":**
- The term "Spongocoel" refers to the central cavity found in sponges. Sponges belong to the phylum **Porifera**.
- **Match:** (a) Spongocoel → (iii) Porifera

2. **Identify "Dorso-ventrally flattened body":**
- The term "Dorso-ventrally flattened body" is characteristic of organisms in the phylum **Platyhelminthes**, commonly known as flatworms.
- **Match:** (b) Dorso-ventrally flattened body → (vi) Platyhelminthes

3. **Identify "Coelenteron cavity":**
- The term "Coelenteron" refers to the gastrovascular cavity found in organisms of the phylum **Cnidaria**. This cavity is used for digestion and circulation.
- **Match:** (c) Coelenteron cavity → (ii) Cnidaria

4. **Identify "Chitinous exoskeleton":**
- The term "Chitinous exoskeleton" describes the protective outer covering made of chitin found in members of the phylum **Arthropoda**.
- **Match:** (d) Chitinous exoskeleton → (i) Arthropoda

### Final Matches:
- (a) Spongocoel → (iii) Porifera
- (b) Dorso-ventrally flattened body → (vi) Platyhelminthes
- (c) Coelenteron cavity → (ii) Cnidaria
- (d) Chitinous exoskeleton → (i) Arthropoda

### Summary of Matches:
- A → iii
- B → vi
- C → ii
- D → i