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
Passavants ridge is formed by - 
Select and explain. 
A. Palatoglossus, B. Superior constrictor, C. Salpingopharyngeus, D. Palatopharyngeus
D: Palatopharyngeus
Answer: D: Palatopharyngeus 
Explanation: None