Organisms without nucleus and cell organelles belong to
i) Fungi
ii) Protista
iii) Cyanobacteria
iv) Archaebacteria
Correct option is B. (iii) and (iv)
Both Cyanobacteria and Archaebacteria are prokaryotes as the genetic material is not enclosed by nuclear envelope.
cyanobacteria are blue green and photosynthetic, they fix atmospheric Nitrogen.
Archaebacteria can be methanogens, extremophiles etc
so, the correct answer is '(iii) and (iv)'