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Railways PYQCBT 1 2016

RRB NTPC · Question 64

Which of the following is the most common kidney stone forming compound?

  1. Calcium oxalate

  2. Magnesium oxide

  3. Sodium bicarbonate

  4. Magnesium citrate

Show answer & explanation

Answer: (A) Calcium oxalate

Explanation

About 80% of kidney stones are calcium stones, and most of these are calcium oxalate. Oxalate-rich foods, low fluid intake and some metabolic conditions increase the risk.