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: Unknown
Pain in vertex is seen in: 
Select and explain. 
A. Ethmoid sinusitis, B. Sphenoid sinusitis, C. Frontal sinusitis, D. Maxillary sinusitis
B: Sphenoid sinusitis
Answer: B: Sphenoid sinusitis 
Explanation: - In sphenoiditis, vertex 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