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': 'Passavants ridge is formed by - \nSelect and explain. \nA. Palatoglossus, B. Superior constrictor, C. Salpingopharyngeus, D. Palatopharyngeus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]