This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Scanty, foul-smelling, painless discharge from the ear is characteristic feature of which of the following lesion? \nSelect and explain. \nA. ASOM, B. Cholesteatoma, C. Central Perforation, D. Otitis externa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Scanty, foul-smelling, turbulent, painless discharge from the ear is the characteristic feature of cholesteatoma. Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 75', 'role': 'assistant'}]