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': 'What is involved in formation of d-TMP from d- UMP? \nSelect and explain. \nA. N5, N10-methylene tetrahydrofolate, B. Formimino folate, C. N5 formyl folate, D. Dihydrofolate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Conversion of dUMP to dTMP requires N5, Nw-methylene H4 folate.', 'role': 'assistant'}]