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
Which of the following structures is not seen on bronchoscopy - 
Select and explain. 
A. Trachea, B. Vocal cords, C. Subcarinal lymph nodes, D. First segmental division of bronchi
C: Subcarinal lymph nodes
Answer: C: Subcarinal lymph nodes 
Explanation: None