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
[{'content': "Kiesselbach's plexus is formed by -a) Greater palatine arteryb) Septal branch of sphenopalatine arteryc) Posterior ethmoidal arteryd) Septal branch of superior labial arterye) Anterior ethmoidal artery \nSelect and explain. \nA. abcd, B. bcde, C. abde, D. ade", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]