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': 'RFLP, True are: \nSelect and explain. \nA. Endonuclease cuts DNA at nucleotide level:, B. It acts at specific site, C. Only cohesive ends are produced, D. Only blunt ends are produced.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. It acts at specific site', 'role': 'assistant'}]