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': 'DNA restriction is done by the following method: \nSelect and explain. \nA. Paper chromatography, B. Electrophoresis agargel method, C. Spectrophotometer, D. Spectrometry', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Electrophoresis agar gel method', 'role': 'assistant'}]