Hydatid disease is caused by one of the following: (A) Taenia solium, (B) Hymenolepis diminuta, (C) Echinococcus granulosus, (D) Dipylidium caninum
Answer is C. (C) Echinococcus granulosus # Echinococcus granulosus, the dog tapeworm or the hydatid worm (formerly called Taenia echinococcus), which has the dog as the definitive host and sheep and humans as the principal intermediate hosts.> In humans it causes unilocular echinococcosis or hydatid disease.