The correct option is D Dahlia
Fasciculated root (tuberous root) occur in clusters at the base of the stem. Fasciculated roots are the means for vegetative reproduction in Dahlia.
Beet roots have Napiform root. The base region of the root is swollen becoming almost spherical in shape, and then it abruptly tapers towards the lower end, forming a tail-like structure.
In carrots - the conical form of root modifications is seen. The roots are swollen and broad at the base, and gradually tapers to form the apex.