This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology, Subject name: Anatomy
Endochondral ossification is seen in - 
Select and explain. 
A. Long bones, B. Flat bones of skull, C. vault of skull, D. Nasal bones
A: Long bones
Answer: A: Long bones 
Explanation: Endochondral ossification : Bone formation within cailage (hyaline cailage) Long bones which undergo Endochondral ossification : TYPES OF OSSIFICATION: 1. Endochondral ossification - Most long bones. 2. Intramembranous ossification - Flat skull bones/Vault bones. 3. Both Endochondral and intramembranous - Clavicle & Mandible (intramembranous> Endochondral)