Consider the following regarding the reasons for the fact that now Cyanobacteria are kept in Monera and not in Plantae:
I. They are prokaryotes.
II. The cell wall of cyanobacteria has peptidoglycan.
III. They can fix atmospheric nitrogen
The Corrcet explanations would be:
(1) I and II only
(2) I and III only
(3) II and III only
(4) I, II and III