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 sensations from the ethmoidal sinus are carried by- 
Select and explain. 
A. Frontal Nerve, B. Lacrimal Nerve, C. Nasocilliary Nerve, D. Infra orbital Nerve
C: Nasocilliary Nerve
Answer: C: Nasocilliary Nerve 
Explanation: As discussed in preceeding text, nasociliary nerve–branch of opthalmic division of trigeminal nerve carries pain sensation from ethmoid sinus.