This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Larynx, Subject name: ENT
In direct laryngoscopy which of the following cannot be visualized: 
Select and explain. 
A. Cricothyroid, B. Lingual surface of epiglottis, C. Arytenoids, D. Pyriform fossa
A: Cricothyroid
Answer: A: Cricothyroid 
Explanation: (a) Cricothyroid(Ref. Dhingra, 6th ed., 422)In Direct laryngoscopy we are visualising the cavity of the larynx from within so cricothyroid muscle or membrane which lie externally cannot be seen.