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': "When two objects come in contact with each other, transfer of material takes place in accordance with - \nSelect and explain. \nA. Mc Naughten rule, B. Locard Exchange principle, C. Rule of Haase, D. Locard's method", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]