This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'What is involved in formation of d-TMP from d-UMP \nSelect and explain. \nA. N5, N10-methylene tetra hydrofolate, B. Form imino folate, C. N5 formyl folate, D. Dihydrofolate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]