What is the Origin of H5N1 Virus

Question

What is the origin of H5N1 virus?  
A) Birds
B) Dogs
C) Pigs
D) Humans
E) Cats

Accepted Answer

H5N1 virus is commonly known as avian influenza virus as it was first identified in birds, particularly in chickens, ducks, and other poultry. It is primarily found in wild birds but can spread to domesticated birds as well. Although it may infect other animals and humans, its natural reservoir is thought to be bird populations.