This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Esthesio neuroblastoma arises from - 
Select and explain. 
A. Olfactory N, B. Maxillary N, C. Ophthalmic N, D. Nasociliary N
A: Olfactory N
Answer: A: Olfactory N 
Explanation: Esthesioneuroblastoma or olfactory neuroblastoma are uncommon highly malignant tumors, arising from the neuroendocrine cells in the olfactory mucosa. Ref : Osborn Neuroradiology 1/e p493