This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infections and Inflammatory Conditions, Subject name: ENT
[{'content': 'Tubercular laryngitis affects primarily: \nSelect and explain. \nA. Anterior commissure, B. Posterior commissure of larynx, C. Anywhere within the larynx, D. Superior surface of larynx', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (b) Posterior commissure of larynx(Ref. Scott Brown, 8th ed., Vol 3; 1018)Mostly the granulomatous conditions of the larynx start in the anterior part of the larynx except for tuberculosis which starts and mainly involves the posterior part.', 'role': 'assistant'}]