Match the columns and select the correct option .
`{:(Column-I,Column-II),((a)"Chondrichthyes ",(i)"Tympanum"),((b)"Osteichthyes",(ii)"Beak"),((c)"Amphibia",(iii)"Operaculum"),((d)"Reptilia",(iv)"Hair"),((e)"Aves",(vi)"Persistent notochord"),((f)"Mammlia",(vi)"Scales or scutes"):}`

Options

A. `{:((a)(b)(c )(d)(e)(f)),((iii)(v)(i)(vi)(ii)(iv)):}`
B. `{:((a)(b)(c )(d)(e)(f)),((v)(iii)(vi)(i)(ii)(iv)):}`
C. `{:((a)(b)(c )(d)(e)(f)),((v)(iii)(i)(vi)(ii)(iv)):}`
D. `{:((a)(b)(c )(d)(e)(f)),((v)(iii)(i)(vi)(iv)(ii)):}`

Answer

To solve the matching question, we will analyze each group in Column-I and find their corresponding features in Column-II based on the characteristics of each class of animals.

### Step-by-Step Solution:

1. **Identify the Class Chondrichthyes (a)**:
- Chondrichthyes are characterized by having a persistent notochord, which is cartilaginous in nature.
- Match: **(a) → (vi) Persistent notochord**.

2. **Identify the Class Osteichthyes (b)**:
- Osteichthyes (bony fish) are known for having an operculum, which is a bony flap covering the gills.
- Match: **(b) → (iii) Operculum**.

3. **Identify the Class Amphibia (c)**:
- Amphibians typically have moist skin that may have scales or scutes, but they are not primarily known for scales. However, they do have a unique skin texture.
- Match: **(c) → (vi) Scales or scutes**.

4. **Identify the Class Reptilia (d)**:
- Reptiles are characterized by having a tympanum, which is an external ear structure.
- Match: **(d) → (i) Tympanum**.

5. **Identify the Class Aves (e)**:
- Birds (Aves) are distinguished by their beaks, which are adapted for their feeding habits.
- Match: **(e) → (ii) Beak**.

6. **Identify the Class Mammalia (f)**:
- Mammals are characterized by having hair on their bodies, which is a defining feature of this class.
- Match: **(f) → (iv) Hair**.

### Summary of Matches:
- (a) Chondrichthyes → (vi) Persistent notochord
- (b) Osteichthyes → (iii) Operculum
- (c) Amphibia → (vi) Scales or scutes
- (d) Reptilia → (i) Tympanum
- (e) Aves → (ii) Beak
- (f) Mammalia → (iv) Hair

### Final Matching:
1. (a) → (vi)
2. (b) → (iii)
3. (c) → (vi)
4. (d) → (i)
5. (e) → (ii)
6. (f) → (iv)

### Correct Option:
Based on the analysis, the correct option is the one that matches the above findings.