The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following drug must be sold only on production of a prescription by a registered medical practitioner?   (A) Schedule H   (B) Schedule G   (C) Schedule X   (D) Schedule M
['(A) Schedule H <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Schedule H \n (B) Schedule G \n (C) Schedule X \n (D) Schedule M <> possible answers', '  Which of the following drug must be sold only on production of a prescription by a registered medical practitioner? <> context@']