In birds, the feathers are modifications of

Options

A. Dermal scales
B. Epidermal scales
C. Plates
D. None of these

Answer

### Step-by-Step Solution:

1. **Understanding the Types of Scales**:
- In the animal kingdom, there are different types of scales found in various groups. The two main types are dermal scales and epidermal scales.

2. **Identifying the Presence of Scales in Birds**:
- Dermal scales are primarily found in reptiles, while epidermal scales are present in birds. It is important to note that birds do not have dermal scales.

3. **Connecting Feathers to Scales**:
- Feathers in birds are actually modifications of epidermal scales. This means that the structure and composition of feathers have evolved from the epidermal scales that are present in birds.

4. **Excluding Other Options**:
- Dermal scales and plates are not found in birds. Dermal scales are associated with reptiles, and plates are specific to certain reptiles like crocodiles.

5. **Conclusion**:
- Therefore, the correct answer to the question is that feathers in birds are modifications of epidermal scales.

### Final Answer:
In birds, the feathers are modifications of **epidermal scales**.