<prompt> Internal orifice of branchial Fistula is located at:Lower third of neck over anterior border of starnocleidomastoidFloor of external auditory canalPosterior tonsillar pillarAnterior to tragus on the ipsilateral side  <response>: Branchial festula represents 2nd branchial cleft:Internal orifice: Anterior aspect of posterior tonsillar pillar.External orifice: Lower third of neck over anterior border of sternocleidomastoid. 