Microbiology question Which of the following is the most un

Microbiology question :

Which of the following is the most unique aspect of archaeon cell envelopes?

a) The plasma membrane is composed of phospholipids.

b) The cell walls contain a modified type of peptidoglycan.

c) Archaeon capsules can be composed of protein or polysaccharide.

d) Some archaeons have lipid monolayers in their plasma membrane.

The distinct features is

Some archeons have a lipid monolayer in their plasma memberane..!!!