<prompt> Blood supply of the Eustachian tube is by all except -Ascending pharyngeal aeryMiddle meningeal aeryAery of pterygoid canalFacial aery  <response>: The facial aery is the chief aery of the face. It is a branch of the external carotid aery. The facial aery is very touous. The touosity of the aery prevents its walls from being unduly stretched during movements of the mandible, the lips and the cheeks. Ref: BD Chaurasias HUMAN ANATOMY, Volume 3, 4th edition. 