The correct option is A Plasma membrane
Plasmalemma or cell membrane is the biological membrane, that separates the cell’s interior from surrounding. It is a phospholipid bilayer, with embedded protein and serves as a selective permeable membrane. Bilayer has phospholipid molecules, with all the hydrophilic ends of phospholipids directed toward the inner and outer surfaces and the hydrophobic ends buried within the interior. So, the correct answer is A.