The correct option is B 30
The cell membrane is the outer covering of the animal cell but in plant cells, it presents below the cell wall. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins. Cell membranes are involved in a variety of cellular processes. For the functioning of the cell membrane, almost 30 enzymes are involved. Hence the correct option is B.