Different types of excretory structures and animals are given below. Match them appropriately and mark the correct answer from among those given below:

Excretory structure/organ	Animals
A. Protonephridia	i. Prawn
B. Nephridia	ii. Cockroach
C. Malpighian tubules	iii. Earthworm
D. Green gland or Antennal gland	iv. Flatworms

The correct option is C A-iv, B-iii, C-ii, D-i

Protonephridia - Flatworms

Protonephridia or flame cells are the excretory structures in some organisms such as platyhelminthes (flatworms, e.g., Planaria), rotifers, some annelids, and the cephalochordate - Amphioxus.

Nephridia - Earthworms

• Nephridia are tubular excretory structures of earthworms and other annelids.
• Nephridia helps to remove nitrogenous wastes and maintain a fluid and ionic balance.

Malpighian tubules - Cockroach

• Malpighian tubules are the excretory structures of most insects. E.g. cockroaches.
• Malpighian tubules help in the removal of nitrogenous wastes and osmoregulation.

Antennal glands or green glands - Prawn

A pair of antennal glands or green glands perform the excretory function in crustaceans like prawns.

Final answer
option(a)A-iv, B-iii, C-ii, D-i