This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CSOM and its Complications, Subject name: ENT
[{'content': "Investigation of choice for cholesteatoma: \nSelect and explain. \nA. Schuller's view X-ray, B. Otoscopy, C. Skull X-ray, lateral view, D. HRCT temporal bone", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. d (HRCT temporal bone). (Ref. Diseases of ENT, PL Dhingra, 3rd ed., 94)HRCT delineates extent of bone destruction, degree of mastoid pneumatization, status of dural and sinus plates, plates with low lying dura or an anteposed sigmoid sinus (useful when operative treatment is being contemplated) and complications if any in a highly better fashion than a Schuller's view of mastoid. Cholesteatoma causes destruction in key areas of attic and antrum, which is better seen in lateral view, however HRCT temporal bone gives more precise and greater detailed information.", 'role': 'assistant'}]