<prompt> Prolonged blockade of Eustachian tube leads to -Atelectatic earCholesteatomaPerforationAll of the above  <response>: Ans. is d i.e., All of the above Effects of acute and prolonged tubal blockageAcute tubal blockageAbsorption of ME gasesNegative pressure in MERetraction of TMTransudate in MEhaemorrhage acute OMEProlonged tubal blockagedysfunctionOME thin watery or mucoid dischargeAtelectatic ear perforationRetraction pocket cholesteatomaErosion of incudostapedial jointME, middle ear; TM, tympanic membrane; OME, otitis media with effusion. 