This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Pain in veex is seen in \nSelect and explain. \nA. Ethmoid sinusitis, B. Sphenoid sinusitis, C. Frontal sinusitis, D. Maxillary sinusitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In sphenoiditis, veex headache is common, but pain can be localized in frontal, temporal, periorbital, or occipital regions or can be vague or occur anywhere in the craniofacial region.', 'role': 'assistant'}]