Which of the following kidney stones are most common?

Correct answer: A. Calcium oxalate

  • A. Calcium oxalate
  • B. Calcium phosphate
  • C. Uric acid
  • D. All of these

Explanation

Calcium oxalate stones are the most common type of kidney stone and form when calcium combines with oxalate in concentrated urine. The likely distractor is “all of these,” because calcium phosphate and uric acid stones also occur, but they are less common than calcium oxalate stones.

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