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': 'Mobile bone of skull ? \nSelect and explain. \nA. Maxilla, B. Mandible, C. Ethmoid, D. Sphenoid', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Mandible", 'role': 'assistant'}]