**Question:** Osteochondroma arises from

A. Chondrocytes
B. Osteoblasts
C. Osteocytes
D. Tenocytes

**Core Concept:** Osteochondroma is a benign bone tumor that develops from the periosteum, the outer layer of bone. It consists of both bone and cartilage components.

**Why the Correct Answer is Right:** Osteochondroma arises from chondrocytes, which are the primary cells responsible for cartilage synthesis. These cells are found within the periosteum, the connective tissue layer surrounding the bone. The tumor develops from the periosteum, consisting of both bone and cartilage components.

**Why Each Wrong Option is Incorrect:**

A. Chondrocytes are not responsible for bone formation but for cartilage synthesis, making option A incorrect.
B. Osteoblasts are the cells responsible for bone formation and not involved in the development of osteochondroma.
C. Osteocytes are mature bone cells responsible for maintaining bone structure, not involved in the formation of osteochondroma.
D. Tenocytes are the cells responsible for producing tendons and ligaments, not relevant to the development of osteochondroma.

**Clinical Pearl:** Osteochondroma is a benign tumor that can form at any age, but most commonly occurs in childhood and adolescence. It is the most common type of bone tumor, affecting about 1 in 100,000 people.

**Correct Answer:** C. Osteocytes (Option C is correct because osteocytes are mature bone cells responsible for maintaining bone structure, but not involved in the formation of osteochondroma.)