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: Biochemistry
DNA fingerprinting 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: DNA fingerprinting (by PCR) has revolutionized the analysis of evidence from crime scenes in determining whether the sample comes from specific individual and verification of paternity. DNA fingerprinting is done by nucleated cells eg blood cells (WBC & RBC), semen, vaginal epithelial cells, tooth pulp, bone marrow, hair roots, muscle, skin, mucous membrane.