The answer is: B. Dog
The other four options are all ruminants, which means they have a four-chambered stomach that helps them digest tough plant material. Dogs, on the other hand, are carnivores and have a simple stomach.
Goats, sheep, and cows are all members of the bovine family, while camels are members of the camelid family. All four of these animals are herbivores and have a four-chambered stomach.
Dogs are members of the Canidae family, which also includes wolves, foxes, and coyotes. Dogs are carnivores and have a simple stomach.