The correct option is
C Malphigian tubules
Phylum Arthropoda is characterized by following features:
(1) Body triploblastic, coelomate, bilaterally symmetrical and metamerically segmented.
(2) Possess a chitinous exoskeleton which undergoes periodic moulting.
(3) True nephridia absent, excretion is carried out by coelom ducts or by malphigian tubules, etc.
For example., king crab, prawn, grasshopper, honey bee, etc.
Thus, option C is the correct answer.