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': 'Endochondral ossification is seen in: \nSelect and explain. \nA. Long bones, B. Flat bones of skull, C. Clavicle, D. Mandible', 'role': 'user'}, {'content': "Answer: A \nExplanation: Nasal bones are formed by intramembranous ossification. In long bones of the limbs the mesenchyme condenses and form hyaline cailage models and ossification centers appear and the bone ossifies slowly which is called endochondral ossification.Ref: Langman's Embryology", 'role': 'assistant'}]