This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
Kiesselbach's plexus is formed by septal branches all except? 
Select and explain. 
A. Posterior ethmoidal artery, B. Sphenopalatine artery, C. Anterior ethmoidal artery, D. Greater palatine artery
A: Posterior ethmoidal artery
Answer: A: Posterior ethmoidal artery 
Explanation: Ans. A. Posterior ethmoidal arteryKiesselbach's plexus, which lies in Little's area, is a region in the anteroinferior part of the nasal septum where four arteries anastomose to form a vascular plexus. The arteries are:a. Anterior ethmoidal artery (branch of the ophthalmic artery)b. Sphenopalatine artery (terminal branch of the maxillary artery)c. Greater palatine artery (from the maxillary artery)d. Septal branch of the superior labial artery (from the facial artery)