The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is not an obstructive cause of mouth breathing:   (A) Deviated nasal septum.   (B) Short lip.   (C) Narrow maxilla.   (D) Obstructive adenoids.
['(B) Short lip. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Deviated nasal septum. \n (B) Short lip. \n (C) Narrow maxilla. \n (D) Obstructive adenoids. <> possible answers', '  Which of the following is not an obstructive cause of mouth breathing: <> context@']