Correct Answer: C
Explanation:
An intermediate host is absent in Ascaris. In the figure the life cycle of the Ascaris shows that there is no intermediate host.
Ascaris lumbricoides is the giant roundworm of humans, growing to a length of up to 35 cm. It is one of several species of Ascaris. An ascarid nematode of the phylum Nematoda, it is the largest and most common parasitic worm in humans.
Liver fluke: First intermediate host is snail and second intermediate host is fish.
Tapeworm: cattle and pigs are intermediate host. Humans are the only definite host.
Plasmodium: Mosquito is the intermediate host.