<prompt> All of the following statement about Renal Calculi are true, Except:Cystine stones form in acidic urineStruvite stones form in alkaline urineOxalate stones are radiopaqueUric acid stones are resistant to ESWL  <response>: Answer is D Uric acid stones are resistant to ESWL: Uric acid stones are not resistant to ESWL. Uric acid stones are infact most responsive to Lithotripsy along with calcium oxalate dehydrate stones. 