The correct option is C Ascaris
Animals having both female and male sex organs in same organism are called monoecious or bisexual or hermaphrodite.
Spongilla (fresh water sponge), Ctenoplana (ctenophora) and Fasciola (liver fluke) are monoecious or bisexual organisms. Ascaris are dioecious (unisexual), where male and females are anatomically different from each other.