The correct option is
C Digenetic and pathogenic
Fasciola hepatica or the common liver fluke or sheep liver fluke is a parasitic trematode of the class Trematoda under the phylum Platyhelminthes that infects the livers of various mammals (pathogenic). It is digenetic as sexual reproduction in liver fluke as an internal parasite of a vertebrate alternate with asexual reproduction in a mollusc.
So, the correct answer is option C.