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: Microbiology
Pigs are important source of: 
Select and explain. 
A. Japanese encephalitis, B. Kuru, C. Yellow fever, D. Rabies
A: Japanese encephalitis
Answer: A: Japanese encephalitis 
Explanation: Japanese encephalitis virus: 

JE virus is a flavivirus, which causes JE, the most common cause of epidemic encephalitis. Birds and pigs are two main reservoir hosts. 
JE is transmitted to humans by certain species of Culex mosquitoes widely prevalent in rice fields in Asia.

Parija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page:539