<prompt> Most common perforation site in tympanic membrane in ASOM:Antero-inferiorPostero-inferiorAntero-superiorPostero-superior  <response>: a Antero-inferiorRef. Shambaugh, 6th ed., 437; Scott Brown, 8th ed., Vol 2; 147.However this answer is controversial as according to Shambaugh it is most commonly anteroinferior but Scott Brown says it is the posterior half of pars tensa. 