19. Which one of the following is found in kidney stones? A.Sodium oxalate B.Calcium oxalate C.Sodium chloride D.Calcium acetate
Answer: Option B Solution: The most common type of kidney stone is a calcium oxalate stone. These result when the urine contains low levels of citrate and high levels of calcium and either oxalate or uric acid. Calcium oxalate stones are linked with foods high in oxalate, which is a naturally occurring substance in plants and animals.