Blood stain component to be used for DNA profiling technique is

Serum

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Leucocytes

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Platelets

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Erythrocytes

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Solution

The correct option is B Leucocytes
B. leucocytes
Solution : leucocytes are the only components that have nucleus . Platelets and erythrocytes do not have nucleus . Serum is the solute and solvent component of blood that does not contain clotting elements and cellular components. The leucocytes are used for the DNA profiling by the DNA isolated from the leucocyte nucleus.
So the correct answer is " Leucocytes"

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