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
Edmund Locard is known for his - 
Select and explain. 
A. System of personal identification using the body measurement, B. Finger print study, C. Formula for estimation of stature, D. Theory of exchange
D: Theory of exchange
Answer: D: Theory of exchange 
Explanation: None