Read the following statements regarding archaebacteria.
I. Their cell wall lacks peptidoglycan.
II. They contain membrane bound organelles.
III. These have distinct ribosomal RNA sequence.
IV. Lipid in cell membrane of archaebacteria have different structure than those in all other organisms.
Choose the incorrecct option.
(1) I and II
(2) Only II
(3) Only IV
(4) III and IV