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: ENT
Bernoulli's theorem explains - 
Select and explain. 
A. Nasal polyp, B. Thyroglossal cyst, C. Zenker's diverticulum, D. Laryngomalacia
A: Nasal polyp
Answer: A: Nasal polyp 
Explanation: The increased speed of the air flowing through the nose decreases the pressure in the nasal cavity (Bernoulli's theorem) which pulls down the polyp.