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': 'Which of the following is the first bone to ossify in human body \nSelect and explain. \nA. Mandible, B. Maxilla, C. Clavicle, D. Humerus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The mandible is the second bone, next to the clavicle, to ossify in the body.', 'role': 'assistant'}]