Which aery is responsible for epistaxis after ligation of external carotid aery?: (A) Ethmoidal aery, (B) Greater palatine aery, (C) Ascending pharyngeal aery, (D) Superior labial aery
Answer is A. Ethmoidal aery is a branch of internal carotid aery while rest of the aeries provided in the options are branches of external carotid aeries, thereby after ligation of external carotid aery, ethmoidal aery is the only aery which can cause epistaxis.