Source of epistaxis after ligation of external carotid aery is:: (A) Maxillary aery, (B) Greater palatine aery, (C) Superior labial aery, (D) Ethmoidal aery
Answer is D. A, B and C are branches of external carotid aery. If external carotid aery is ligated,the source of epistaxis will be Ethmoidal aery which is a branch of internal carotid aery. Ref Dhingra 6/e,p 178.