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': 'A man presented with complaints of scanty, foul smelling, painless discharge from the ear. It is characteristic feature of the following lesion: \nSelect and explain. \nA. ASOM, B. Cholesteatoma, C. Central perforation, D. Otitis externa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Patients with acquired cholesteatomas typically present with recurrent or persistent purulent otorrhea and hearing loss. The discharge is scanty & always foul-smelling due to bone destruction. Facial nerve twitching, palsy, or paralysis can also result from the inflammatory process or from mechanical compression of the nerve. Ref: Chang C. (2012). Chapter 50. Cholesteatoma. In A.K. Lalwani (Ed), CURRENT Diagnosis & Treatment in Otolaryngology--Head & Neck Surgery, 3e.', 'role': 'assistant'}]