Sesamoid bone (ossified tendon) is 
(a) Cartilage
(b) Areolar tissue
(c) Tendon
(d) Ligament

Options

A. Cartilage
B. Areolar tissue
C. Tendon
D. Ligament.

Answer

To solve the question regarding the nature of sesamoid bones (ossified tendons), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sesamoid Bones**:
- Sesamoid bones are a specific type of bone that forms within tendons. They are not regular bones but rather bones that develop in response to stress or strain on the tendon.

2. **Definition of Ossification**:
- Ossification is the process through which bone is formed. In the case of sesamoid bones, this process occurs within tendons.

3. **Identifying the Options**:
- (a) Cartilage: This is a flexible connective tissue, not bone.
- (b) Areolar tissue: This is a type of loose connective tissue, not related to bone formation.
- (c) Tendon: Tendons are connective tissues that attach muscles to bones. Sesamoid bones are formed from the ossification of tendons.
- (d) Ligament: Ligaments connect bones to other bones, not involved in the formation of sesamoid bones.

4. **Conclusion**:
- Since sesamoid bones are formed from the ossification of tendons, the correct answer is (c) Tendon.

### Final Answer:
(c) Tendon

---