The correct option is B Phospholipids
The plasma membrane is the outer covering of all the cells but in a plant cell, it is present below the cell wall. It is made up of a phospholipid bilayer. Phospholipids are lipids with a phosphate group attached to them. The phospholipids have one hydrophilic head and two hydrophobic tails. The lipid bilayers have embedded proteins. Thus, the correct answer is option B.