This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
[{'content': 'A 12-year-old child presents with U/L pink nasal mass. Most important investigation prior to undertaking surgery is: \nSelect and explain. \nA. Ultrasound, B. FNAC, C. Biopsy, D. Contrast CT scan', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (d) Contrast CT scan(Ref. Cummings, 6th ed., 1422)An adolescent male with U/L pink nasal mass has to be investigated to rule out angiofibroma. So the next best investigation prior to undertaking surgery is a Contrast enhanced CT scan.FNAC and biopsy are contraindicated here for the fear of profuse bleeding.', 'role': 'assistant'}]