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': 'X-ray findings in chronic otitis media ? \nSelect and explain. \nA. Honeycombing of mastoid, B. Sclerosis with cavity in mastoid, C. Clear-cut distinct bony paition between cells, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Sclerosis with cavity in mastoid", 'role': 'assistant'}]