This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epistaxis, Subject name: ENT
[{'content': 'All of the following blood vessels are a part of Kiesselbachfs plexus except- \nSelect and explain. \nA. Anterior Ethmoidal artery, B. Posterior ethmoidal artery, C. Greater palatine artery, D. Superior labial artery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Posterior ethmoidal artery o Four arteries contribute to little\'s area:# Anterior ethmoidal artery# Septal branch of superior labial artery (Branch of facial A).# Septal branch of sphenopalatine artery (Branch of maxillary A).# Greater palatine artery (Branch of maxillary A).o These arteries anastomose to form a vascular plexus called "Kiesselbach\'s plexus".', 'role': 'assistant'}]