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: Medicine
[{'content': 'True about DNA reconstruction technology: \nSelect and explain. \nA. Restriction endonucleases involved, B. DNA ligase is used, C. Acid phosphatase is used and Reverse transcriptase needed both, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A, B & C i.e. Restriction endonucleases involved, DNA ligase is used, Reverse transcriptase needed', 'role': 'assistant'}]