Correct Option
Statement 1: Tapeworms (Phylum Platyhelminthes) are hermaphroditic organisms. They possess both male and female reproductive organs within the same individual, often in each proglottid, enabling self-fertilization.
Statement 2: Roundworms (Phylum Nematoda) are dioecious, meaning they have separate male and female individuals with distinct reproductive organs.
Statement 3: Filariasis, commonly known as Filaria, is a parasitic disease caused by filarial nematodes (roundworms), such as Wuchereria bancrofti. These parasites are transmitted to humans through mosquito bites.
Incorrect Options
Statement 4: Guinea-worm (Dracunculus medinensis) is a parasitic nematode, not an annelid. Annelids are segmented worms, including earthworms and leeches.
Option (a) is incorrect as it omits statement 3, which is a correct statement.
Option (c) is incorrect as it includes statement 4, which is an incorrect statement.
Option (d) is incorrect as it includes statement 4, which is an incorrect statement.