Jaw suspension of mammals is
(a) Craniostylic
(b) Autostylic
(c) Both
(d) None

Options

A. Craniostylic
B. Autostylic
C. Both
D. None

Answer

To determine the type of jaw suspension in mammals, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Jaw Suspension**:
- Jaw suspension refers to the way the lower jaw (mandible) is attached to the upper jaw (maxilla) and the skull. This attachment is crucial for effective biting and chewing.

2. **Types of Jaw Suspension**:
- There are different types of jaw suspensions in vertebrates, primarily categorized as:
- **Craniostylic**: The upper jaw fuses with the cranium.
- **Autostylic**: The lower jaw is directly attached to the skull without the upper jaw being fused.

3. **Jaw Suspension in Mammals**:
- In mammals, the jaw suspension is classified as **craniostylic**. This means that the upper jaw is fused to the cranium along its length.
- The lower jaw articulates with the upper jaw via two dermal bones, which facilitate this connection.

4. **Conclusion**:
- Given the definitions and characteristics of jaw suspensions, the correct answer to the question is:
- (a) Craniostylic.

### Final Answer:
The jaw suspension of mammals is (a) Craniostylic.

---