In Annelids, excretory organs area. Nephridiab. Malpighian Tubulesc. Green Glandsd. Kidneys

In Annelids, the excretory organs are known as nephridia. Nephridia are responsible for the excretion of metabolic waste products, regulation of osmotic balance, and maintenance of fluid homeostasis in these segmented worms. Nephridia are present in each segment of the annelid body, and their structure and function can vary among different species of annelids.

The other options you mentioned, such as malpighian tubules, green glands, and kidneys, are excretory organs found in other animal groups but not in annelids specifically.

Malpighian tubules are found in insects and certain other arthropods. They are long, slender tubules that are involved in the removal of metabolic wastes and regulation of osmotic balance.

Green glands, also known as antennal glands, are excretory organs found in crustaceans, particularly in marine species such as crabs and lobsters. They are located near the base of the antennae and are involved in the excretion of metabolic wastes, ions, and the regulation of osmotic balance.

Kidneys, on the other hand, are excretory organs found in vertebrates, including humans. They are responsible for filtering blood, removing waste products, regulating electrolyte balance, and maintaining fluid homeostasis in the body.

Therefore, in annelids specifically, the correct answer is option A: Nephridia.