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 35 year old male presented with nasal discharge, facial pain and fever which subsided with a course of antibiotics and antihistaminics, which recurred again after 2 months. O/E mucopurulent discharge from middle meatus, and inflammed sinus openings, investigation of choice - \nSelect and explain. \nA. X-ray PNS, B. NCCT PNS, C. MRI of the face, D. Inferior meatal puncture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]