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 incorrect option.

Archaebacteria are prokaryotic organisms. These organisms contain a cell membrane which is made up of amino acids and glycolipids which are linked by an ether linkage. There is no peptidoglycan as in the bacterial cell wall. They are prokaryotes which do not have membrane-bound organelles. They have 16S rRNA genes which are genetically different from other organisms. The lipids in archaebacteria form an S-layer with the amino acids and glycolipids. Thus, the correct answer is option B.