There is no DNA in
a)	An enucleated ovum	b)	Mature RBCs
c)	A mature spermatozoan	d)	Hair root

(b)

The chromatin material inside the nucleus is composed of DNA, some proteins and RNA. Thus, in an enucleated ovum, DNA will be present in mitochondria.

The mature RBCs, lack nucleus and membrane bound cell organelles, i.e., lack DNA in nucleus and mitochondria.