This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'In the first step of Heme synthesis, what is required - \nSelect and explain. \nA. Fe, B. Folate, C. Glycine, D. Histidine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Two starting materials of heme synthesis are succinyl-CoA and glycine. Pyridoxal phosphate is also required.', 'role': 'assistant'}]