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
Pain sensation from ethmoid sinus is carried by 
Select and explain. 
A. Ethmoid nerve, B. Nasociliary nerve, C. Maxillary nerve, D. Greater petrosal nerve
B: Nasociliary nerve
Answer: B: Nasociliary nerve 
Explanation: None