There is no DNA in :

Hair root

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An enucleated ovum

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Mature RBCs

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A mature spermatozoan

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Solution

The correct option is D Mature RBCs
Hair root or hair follicle is the living part of the hair that produces the shaft, follicle contains a group of cells that are nucleated.
An enucleated ovum contains DNA in the mitochondria
A mature spermatozoan contains DNA in the head region
A mature RBC in all mammals except Camel does not contain nucleus at maturity. Hence they do not contain DNA.
So, the correct answer is 'Mature RBCs'

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