The correct option is D A- II, B- III, C- IV, D- I
Fasciola buski which causes fasciolopsiasis is the largest intestinal fluke of humans.
Fasciola hepatica also known as sheep liver fluke, is a parasitic trematode of the class Trematoda, phylum Platyhelminthes that infects the livers of various mammals.
Fasciola gigantica also known as liver fluke of cattle is a parasitic flatworm of the class Trematoda, which causes tropical fascioliasis.
Clonorchis sinensis also known as the Chinese liver fluke, is a human liver fluke in the class Trematoda, phylum Platyhelminthes. This parasite lives in the liver of humans and is found mainly in the common bile duct and gallbladder, feeding on bile.
So, the correct answer is option D.