(A) Calcium Oxide
(B) Calcium Oxalate
(C) Calcium Silicate
(D) None of these
🧠 Explanation:
Kidney stones primarily form due to the crystallization of certain compounds in the urine when their concentration becomes too high. The most common compound responsible for kidney stones is **calcium oxalate**. These stones develop when calcium combines with oxalate, a substance found in many foods and produced by the liver. Other compounds like uric acid, struvite, and cystine can also form stones but less frequently. Factors like dehydration, diet, genetics, and certain medical conditions influence stone formation. Understanding the chemical composition helps in prevention and treatment strategies, including dietary changes and medications to reduce stone risk.