This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Man - snail - crab man cycle is seen in \nSelect and explain. \nA. Paragonimus westermanii, B. Fasciola hepatica, C. Schistosoma mansoni, D. Echinococcus granulosus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ParasiteFirst intermediate hostSecond intermediate hostParagonimus westermaniFresh water snail Crab/ Cray fishDiphyllobothrium latumCopepods (Cyclops)Fresh water fish Clonorchis sinensisSnail Fresh water fish Fasciola hepaticaSnail Aquatic vegetation Fasciolopsis buskiSnail Aquatic vegetation (Ref: K.D Chatterjee 13th edition, p196-198)', 'role': 'assistant'}]