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
Openings of the tube of bronchoscope are known as- 
Select and explain. 
A. Holes, B. Apertures, C. Vents, D. Any of the above
C: Vents
Answer: C: Vents 
Explanation: Bronchoscope is similar to esophagoscope, but has openings at the distal part of the tube, called Vents which help in aeration of the side bronchi.