This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Endochondral ossification is seen in 
Select and explain. 
A. Clavicle, B. Mandible, C. Nasal bones, D. Flat bones of skull
A: Clavicle
Answer: A: Clavicle 
Explanation: Long bones and medial end of clavicle bone develop by endochondral ossification Flat bones of skull; facial skeleton; mandible and lateral end of clavicle develop by intramembranous ossification. Ref: Gray's39e/p185-210