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
Example for "AMPLIFIER HOST" 
Select and explain. 
A. Pig in JE, B. Dog in hydatid disease, C. Cattle in mad cow disease, D. Rat in plague
A: Pig in JE
Answer: A: Pig in JE 
Explanation: <p> Infected pigs do not manifest any ove symptoms of illness but circulate the virus so that mosquitoes get infected and can transmit the virus to man. Thus pigs are thus considered as &;amplifiers&; of the virus. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:285. <\p>