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
Malignant hydatid cyst is caused by: 
Select and explain. 
A. Echinococcus granulosus, B. E. multilocularis, C. E. vogeli, D. E. oligahus
B: E. multilocularis
Answer: B: E. multilocularis 
Explanation: Ans. b. E. multilocularis