Question

what is the primary component of kidney stones?
cholesterol
uric acid
sodium
calcium oxalate

Explanation:

Kidney stones are solid masses formed in the kidneys. Cholesterol is mainly related to gallstones. Sodium is an electrolyte in the body and not the main component of kidney stones. Uric acid can form some types of kidney stones, but calcium oxalate is the most common primary component of kidney stones.

Answer:

Calcium oxalate