<prompt> Which is the most common cause of calcium oxalate stones?HyperparathyroidismIdiopathic HypercalciuriaDietary intake of milk-based productsRenal tubular acidosis type 1  <response>: Most common cause of calcium oxalate stones- Idiopathic Hypercalciuria Other causes are- Hyperuricosuria Primary hyperparathyroidism Distal renal tubular acidosis Dietary hyperoxaluria 