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': 'True about DNA reconstruction technology - \nSelect and explain. \nA. Restriction endonucleases involved, B. DNA ligase is used, C. Reverse transcriptase needed, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]