Not a test for Eustachian tube patency ?
Ans. is 'a' i.e., Tympanometry Tests for Eustachian tubepatency Valsalva test Methylene blue test Sonotubometry Politzer test Toynbee test Frenzel maneuver Catheterization Inflation - Deflation test
Tympanometry
Toynbee
Valsalva
Frenzel maneuver