This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Enchondral ossification is/are seen in- 
Select and explain. 
A. Long bones, B. Flat bones of skull, C. Clavicle, D. Mandible
A: Long bones
Answer: A: Long bones 
Explanation: Endochondral (enchondral) ossification → long bones, vertebrae, pelvis, skull base bones.
Intramembranous ossification → Skull vault, maxilla, most of mandible, and clavicle.