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': 'In DNA transfer the vectors used from smallest to largest is - \nSelect and explain. \nA. Cosmids, Plasmids, Bacteriophage, B. Plasmids, Bacteriophage, Cosmids, C. Bacteriophage, Cosmides, Plasmids, D. Cosmids, Bacteriophage, Plasmids', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]