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': 'Thudichum speculum is used for visualizing \nSelect and explain. \nA. Posterior nasal cavity, B. Posterior nares, C. Larynx, D. Anterior nasal cavity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thudichum speculum or vienna type speculum is used to visualize anterior nasal cavity (examination is called anterior rhinoscopy). Posterior nares can be visualized during posterior rhinoscopy using posterior nasal mirror.', 'role': 'assistant'}]