This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Techniques in molecular biology, Subject name: Biochemistry
[{'content': 'Which of the following can be used as vector for Gene therapy \nSelect and explain. \nA. Viruses, B. Liposomes, C. Plasmids, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vectors used for gene delivery : Viral Vectors Non-viral Vectors Retroviruses Liposomes Adenoviruses Plasmids Herpes simplex viruses Physical methods', 'role': 'assistant'}]