Dragon or serpent worm is:
Ans. is 'c' i.e., Dracunculus(Ref: Harrison, 19th/e, p. 1422-1423; Chatterjee, 12th/e, p. 203)* Dracunculus medinensis is also known as Guinea worm, Serpent worm, Dragon worm, Medina worm.
Enterobius
Trichuris
Dracunculus
T. Solium
Parasitology