This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pathology
[{'content': 'Hydatid cyst is caused by? \nSelect and explain. \nA. Trypanosoma cruzi, B. Taenia solium, C. Taenia saginata, D. Echinococcus granulosus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hydatid disease Caused by ingestion of eggs of echinococcal species. Definitive host is the dog Intermediate hosts are sheep', 'role': 'assistant'}]