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: Forensic Medicine
[{'content': 'Brain fingerprinting: \nSelect and explain. \nA. Used lie- detector, B. Used by EEG on lead, C. Used for quantitative measurement of sulci, gyri, D. Used by DNA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Used by EEG on lead', 'role': 'assistant'}]