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
A person comes in contact with other. This is called 
Select and explain. 
A. Locard principle, B. Quetlets rule, C. Petty's principle, D. None of the above
A: Locard principle
Answer: A: Locard principle 
Explanation: A i.e. Locard's principle