This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Hydatid disease of liver is caused by -a) Strongloidesb) Echinococcus granulosusc) Taenia soliumd) Trichinella spiralise) Echinococcus multilocularis 
Select and explain. 
A. ab, B. be, C. bc, D. ce
B: be
Answer: B: be 
Explanation: Hydatid disease:

Echinococcus granulosus: Causes Hydatid disease—Hepatomegaly (60—70% of cases), then lungs
E. multilocularis: Causes Alveolar Hydatid disease (90%-liver involvement)
E. oligarthrus and E.vogeli: Causes Polycystic Hydatid disease.