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: Physiology
[{'content': 'The control for mastication is normally exercised by \nSelect and explain. \nA. Pontine centres, B. Sub cortical centres, C. Cerebellar centres, D. Medulla centres', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]