The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Drugs used in urea cycle disorders to reduce ammonia?   (A) Phenyl butarone   (B) Phenyl butyrate   (C) L - Carnitine   (D) Isoleucin
['(B) Phenyl butyrate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Phenyl butarone \n (B) Phenyl butyrate \n (C) L - Carnitine \n (D) Isoleucin <> possible answers', '  Drugs used in urea cycle disorders to reduce ammonia? <> context@']