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
[{'content': 'Which is not visualized on posterior rhinoscopy: \nSelect and explain. \nA. Eustachian tube, B. Inferior meatus, C. Middle meatus, D. Superior concha', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Posterior rhinoscopy: It is method of examination of the posterior aspect of nose and pharynx. Structures seen on posterior rhinoscopy: - Both choanae - Posterior end of nasal septum - Opening of Eustachian - Posterior end of superior/tube middle and inferior turbinates - Fossa of Rosenmuller - Torus Tubarius - Adenoids - Roof and posterior wall and nasopharynx.', 'role': 'assistant'}]