Toynbee test is used to the function of -
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
Eustachian tube
Tympanic membrane
Middle ear
Semicircular canal
Ear