Answer:
The correct option is : b. embedded with the phospholipid heads
Explanation:
Plasma membrane, also called the cell membrane, is a biological semi permeable membrane that surrounds the cell.
The plasma membrane is composed of lipids, proteins and carbohydrate groups.
The lipids consists of a phospholipid bilayer and cholesterol. The cholesterol is embedded in the core of the membrane, along with the phospholipid heads.