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
Source of epistaxis after ligation of external carotid artery is - 
Select and explain. 
A. Maxillary artery, B. Greater palatine artery, C. Superior labial artery, D. Ethmoidal artery
D: Ethmoidal artery
Answer: D: Ethmoidal artery 
Explanation: Nose is Supplied by