Which of the following is not an American Poultry breed?

Answer: Option D

Orpington is not an American poultry breed, while all others given in options are American breeds.
The Orpington is a British breed of chicken. It was bred in the late nineteenth century by William Cook of Orpington, Kent, in southeast England.
It was intended to be a dual-purpose breed, to be reared both for eggs and for meat, but soon became exclusively a show bird.