Final answer:
The "good" lipoproteins are High-density lipoproteins (HDLs), which help transport cholesterol back to the liver and prevent plaque formation in arteries, thus reducing the risk of heart disease. Therefore , the correct answer options is a)
Step-by-step explanation:
The "Good" Lipoproteins
The "good" lipoproteins are known as High-density lipoproteins (HDLs). They play a beneficial role in the body's cholesterol management system by transporting cholesterol from various parts of the body back to the liver, where it can be reused or excreted. HDLs contribute to the prevention of arterial plaque and atherosclerosis, and therefore, maintaining a higher level of HDLs is associated with a reduced risk of heart disease.
In contrast, Low-density lipoproteins (LDLs) are often labeled as the "bad cholesterol transporters" because they deliver cholesterol to tissues throughout the body, including artery walls, potentially leading to plaque buildup and cardiovascular diseases.
It's important to note that saying HDLs and LDLs are good or bad is an oversimplification. The more appropriate terms would be "good cholesterol transporter" for HDL and "bad cholesterol transporter" for LDL. The desirable blood lipid levels are an LDL level of less than 100 mg/dL and an HDL level that is higher, especially to ward off heart disease risks.