Three classes of lipids in the body are:a.Glycerol, fatty acids, and triglyceridesb.. Triglycerides, fatty acids, and cholesterol.c.Fatty acids, phospholipids, and cholesterol.d.Triglycerides, phospholipids, and sterols.

The three classes of lipids in the body are: Fatty acids, phospholipids, and cholesterol. So, the correct answer is c. Fatty acids, phospholipids, and cholesterol.

Here's a brief explanation of each:

1. Fatty Acids: These are the building blocks of the fat in our bodies and in the food we eat. They are a major source of energy and also have other functions in the body.

2. Phospholipids: These are a type of lipid that is a major component of all cell membranes. They can form lipid bilayers because of their amphiphilic characteristic.

3. Cholesterol: This is a type of lipid that is made by the body and is also found in certain types of food. It is used to make hormones and vitamins and is also a component in bile acids which help to digest food.