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
True about DNA reconstruction technology: 
Select and explain. 
A. Restriction endonucleases involved, B. DNA ligase is used, C. Acid phosphatase is used and Reverse transcriptase needed both, D. All
D: All
Answer: D: All 
Explanation: A, B & C i.e. Restriction endonucleases involved, DNA ligase is used, Reverse transcriptase needed