The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Bluegrass appliance is used to treat:   (A) Thumb sucking.   (B) Tongue thrusting.   (C) Both   (D) Mouth breathing.
['(C) Both <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Thumb sucking. \n (B) Tongue thrusting. \n (C) Both \n (D) Mouth breathing. <> possible answers', '  Bluegrass appliance is used to treat: <> context@']