This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Jurisprudence, Subject name: Forensic Medicine
Locard&;s Prinicple is concerned with: 
Select and explain. 
A. Theory of exchange, B. Criminal responsibility, C. Calculating age of fetus, D. Firearm wounds of skull
A: Theory of exchange
Answer: A: Theory of exchange 
Explanation: Locard&;s Principle is considered with Theory of exchange. Locard&;s Exchange Principle Locard&;s exchange principle states that when any two objects come into contact, there is always transfer of material from each object on to the other. This principle is often used as a sure proof of crime. Option A Principle/Rule concerned with Theory of exchange Locard&;s Exchange Principle Option B Principle/Rule concerned with criminal; responsibility for insane Mc. Naughten rule Durham&;s rule Curren&;s rule Brawer rule Option C Principle/Rule concerned with calculating the age of fetus Rule of Hasse Option D Principle/Rule concerned with firearm wounds of skull Puppe&;s Rule Ref: APC Essentials of Forensic Medicine and Toxicology by Anil Aggarwal