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
What is involved in formation of d-TMP from d-UMP 
Select and explain. 
A. N5, N10-methylene tetra hydrofolate, B. Form imino folate, C. N5 formyl folate, D. Dihydrofolate
A: N5, N10-methylene tetra hydrofolate
Answer: A: N5, N10-methylene tetra hydrofolate 
Explanation: None