The correct option is A Rostellum
The adult Taenia solium has a head called scolex that consists of four suckers, a rostellum with a double crown of hooks, unsegmented narrow neck, and a large body formed by several hundred proglottids. Taenia solium dwells within the small intestine of humans, where it is attached to the intestinal wall with its powerful suckers and hooks of the rostellum. So, option A is correct.