This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Amplifier for Japanese encephalitis – 
Select and explain. 
A. Horse, B. Pigs, C. Dogs, D. Monkey
B: Pigs
Answer: B: Pigs 
Explanation: In Japanese encephalitis
Pigs → Amplifiers.
Cattle and buffalos → Mosquito attractants Man → Incidental dead-end host Herons → Reservoir hosts