This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
Sphenoid sinusitis pain is referred most commonly to: 
Select and explain. 
A. Occiput, B. Cost of nose, C. Frontal, D. Temporal region
B: Cost of nose
Answer: B: Cost of nose 
Explanation: Acute sphenoiditis: Headache usually localized to the occiput or veex. Pain may also be referred to the mastoid region. Ref Dhingra 6/e,p 194.