Bony plates with horny epidermal scales occur in

Options

A. Lizards
B. Crocodiles
C. Snakes
D. Both B and C

Answer

To solve the question "Bony plates with horny epidermal scales occur in?", we will analyze each option provided and determine which one correctly describes the presence of bony plates with horny epidermal scales.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- Bony plates refer to hard structures found in the skin of some reptiles.
- Horny epidermal scales are protective outer layers made of keratin, which is a common feature in reptiles.

2. **Analyzing the Options**:
- **Option A: Lizards**:
- Most lizards do not have bony plates. While some lizards, like iguanas, possess epidermal scales, they generally lack the bony plates. Therefore, this option is incorrect.

- **Option B: Crocodiles**:
- Crocodiles are known for having bony plates (called osteoderms) embedded in their skin, along with horny epidermal scales. This option is correct.

- **Option C: Snakes**:
- Most snakes do not have bony plates. They typically have scales but lack the bony structures. Therefore, this option is also incorrect.

- **Option D: Both B and C**:
- Since snakes (Option C) do not have bony plates, this option is incorrect as well.

3. **Conclusion**:
- After analyzing all the options, the only correct answer is **Option B: Crocodiles**. They are the reptiles that possess both bony plates and horny epidermal scales.

### Final Answer:
**B: Crocodiles**