The following are multiple choice questions (with answers) about medical knowledge.   **Question:** intermediate of kreb cycle used in heme synthesis;   (A) succinyl-CoA   (B) Alpha ketoglutarate   (C) Citrate   (D) Aspaate
['(A) succinyl-CoA <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) succinyl-CoA \n (B) Alpha ketoglutarate \n (C) Citrate \n (D) Aspaate <> possible answers', '  intermediate of kreb cycle used in heme synthesis; <> context@']