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': "Passavant's ridges is formed by \nSelect and explain. \nA. Palatopharyngeus muscle, B. Palatoglossus muscle, C. Stylopharageus muscle, D. Buccinator muscle", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]