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
[{'content': 'Enchondral ossification is/are seen in- \nSelect and explain. \nA. Long bones, B. Flat bones of skull, C. Clavicle, D. Mandible', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Endochondral (enchondral) ossification → long bones, vertebrae, pelvis, skull base bones.\nIntramembranous ossification → Skull vault, maxilla, most of mandible, and clavicle.', 'role': 'assistant'}]