Communication between middle ear and Eustachian tube is obliterated in which surgery?: (A) Tympanoplasty, (B) Schwaz operation, (C) Modified radical mastoidectomy, (D) Radical mastoidectomy
Answer is D. In radical mastoidectomy, the opening of Eustachian tube is closed by curetting its mucosa and plugging the opening with tensor tympani muscle or cailage.