42 year old obese patient comes with gallstones. She is on cholesterol lowering drugs and her weight is reduced 10 kgs in the last month. What might be the cause for gallstones
Risk factors for gallstones include-

Obesity
Rapid weight loss
Hemolytic disorders
Cholesterol lowering drugs
Pregnancy
High carbohydrate and lipid diet

Cholesterol lowering drugs reduce the cholesterol in the blood but secretion of cholesterol into bile is increased. Show they cause gallstones.
Obesity
Cholesterol lowering drugs
Rapid weight loss
All of the above