Step 1: Understand the function of statins.
Statins are drugs commonly prescribed to lower cholesterol levels in the blood. They work by inhibiting HMG-CoA reductase, an enzyme responsible for producing cholesterol in the liver.
Step 2: Review the options.
- Statin is the correct choice as it directly lowers cholesterol in the blood.
- Cyclosporin is an immunosuppressant used to prevent organ transplant rejection.
- Lipase is an enzyme that breaks down fats but is not used for lowering cholesterol.
- Streptokinase is used to dissolve blood clots, not to lower cholesterol.
Step 3: Conclude.
Statins are the correct medication used to lower cholesterol levels, making option (A) the correct answer.
Final Answer:
\[
\boxed{\text{Statin}}
\]