<prompt> Toynbee test is used to the function of -Eustachian tubeTympanic membraneMiddle earSemicircular canal  <response>: Ans. is a i.e., Eustachian tube Tests for Eustachian tube patency Valsalva test Methylene blue test Sonotubometry Politzer test Toynbee test Frenzel maneuver Catheterization Inflation - Deflation test 