This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Pig in H1N1 influenza acts as? \nSelect and explain. \nA. Carrier, B. Amplifying host, C. Reservoir, D. Vector', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pig / swine is reservoir of H1N1 influenza. Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 164', 'role': 'assistant'}]