<prompt> Chronic Laxative abusage can result in the formation of which type of stone:XanthineCysteineAmmonium urateStruvite  <response>: Ans. c Ammonium urateRef NCBI pubmed, Bailey and Love 27th Edition, Page 1406Types of stones and interesting etiologies: Primary hyperparathyroidism: Calcium oxalate stones Renal tubular acidosis: Pure calcium phosphate stones Cystinuria Autosomal Recessive: Cystine stones Ileostomies: Uric acid stone IBD: Uric acid stone Crohns disease, short bowel syndromes: Calcium oxalate stones Dietary excess of Rhubarb, spinach, tea, cocoa, chocolate and pepper: Calcium oxalate stone Infection: Calcium magnesium ammonium phosphate stone struvite stones Thiazide diuretics: Uric acid stone Allopurinol: Xanthine stone Laxative abusage: Ammonium urate stone 