The correct option is D Cray fish
Green glands can be defined as a pair of excretory organs in each side of the head region of decapod crustaceans, emptying at the base of the antennae.
Green glands, also called as antennal or maxillary glands, help carry out excretory functions in crayfish. These glands act much like kidneys in humans and help crayfish remain healthy by eliminating toxic substances and waste products in their urinary and circulatory systems.