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': 'Amplifier host is pig for - \nSelect and explain. \nA. Japanese encephalitis, B. KFD, C. Yellow fever, D. West Nile fever', 'role': 'user'}, {'content': "Answer: A \nExplanation: Among the animal host pig have been incriminated as the major veebrae host for JE virus. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 261", 'role': 'assistant'}]