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
[{'content': 'Which of the following is not seen in Indirect Laryngoscopy: \nSelect and explain. \nA. Base of tongue, B. Pyriform fossa, C. Posterior Commissure, D. Sub glottis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hidden areas of larynx which are not seen on Indirect Laryngoscopy : Laryngeal Surface of epiglottis Ventricle Anterior commissure Subglottis Post Cricoid Area', 'role': 'assistant'}]