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: Medicine
DNA finger printing is done by: 
Select and explain. 
A. Splitting DNA, B. DNA of WBC, C. DNA from nucleated cells, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: D i.e. All of the above