This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 2 (Helminthology), Subject name: Microbiology
[{'content': 'Intermediate host for hydatid disease- \nSelect and explain. \nA. Man, B. Dog, C. Cat, D. Foxes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hydatid disease is caused by Echinococcus granulosus. The worm completes its life cycle in two hosts - Definitive Host : Dog Intermediate Host : Sheep & Cattle. Man acts as an accidental intermediate host (Dead end). The larval stage of parasite is passed in intermediate hosts including man, giving rise to hydatid cyst.', 'role': 'assistant'}]