Phylum Aschelminthes

Which of the following statements are wrong related to Nematoda?
(i) Body is covered by tough and protective collagenous cuticle
(ii) Excretory system consists of renette gland and ducts
(iii) Alimentary canal is incomplete
(iv) Sense organs like amphids and plasmids occur
(v) Sexes are not separate (Monoecious)

Coelozoic parasite with syncitial epidermis, pseudocoelom and rhabditiform larva during development.