The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Iron is present in all, EXCEPT   (A) Myoglobin   (B) Cytochrome   (C) Catalase   (D) Pyruvate kinase
['(D) Pyruvate kinase <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Myoglobin \n (B) Cytochrome \n (C) Catalase \n (D) Pyruvate kinase <> possible answers', '  Iron is present in all, EXCEPT <> context@']