input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** All are characteristic features of superior semicircular canal dehiscence except?   (A) Third window phenomenon   (B) SNHL   (C) Tullio's phenomenon   (D) Vestibular evoked myogenic potential is useful investigation.
output: ['(B) SNHL <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Third window phenomenon  (B) SNHL  (C) Tullio's phenomenon  (D) Vestibular evoked myogenic potential is useful investigation. <> possible answers", '  All are characteristic features of superior semicircular canal dehiscence except? <> context']