This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Man is intermediate host of - \nSelect and explain. \nA. Kala azar, B. Filariasis, C. Hydatid cyst, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Man as INTERMEDIATE HOST: (mnemonic: PET) Plasmodium Echinococcus granulosus (Hydatid cyst) Toxoplasma gondii In Tinea solium man may be intermediate or definitive Host.', 'role': 'assistant'}]