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
Restriction fragment length polymorphism uses the technique of: UP 10; NIMHANS 11 
Select and explain. 
A. Southern blotting, B. Nohern blotting, C. Western blotting, D. Eastern blotting
A: Southern blotting
Answer: A: Southern blotting 
Explanation: Ans. Southern blotting