<prompt> Which artery is responsible for epistaxis after ligating of external carotid artery?Ethmoidal arteryGreater palatine arterySuperior labial arteryAscending pharyngeal  <response>: Answer: A Ethmoidal arteryREF: Dhingra 4th ed p. 140Both anterior and posterior ethmoidal arteries are branches from internal carotid artery not external carotid artery 