Eustachian tube patency seen by -
Ans. is 'd' i.e., All the above Tests for Eustachian tube patencyValsalva testo Politzer testo Catheterizationo Methylene blue testo Toynbee testo Inflation-Deflation testo Sonotubometry'o Frenzel maneuver
Valsalva
Methylene blue test
Toyn bee test
All the above