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
In indirect larynogscopy not seen is - 
Select and explain. 
A. Base of tongue, B. Pyriform fossa, C. Glottis, D. Sub glottis
D: Sub glottis
Answer: D: Sub glottis 
Explanation: None