This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Which of the following is not a contraindication for extra corporeal
shockwave lithotripsy for renal calculi 
Select and explain. 
A. Pregnancy, B. Bleeding disorder, C. Stone >2 cm, D. Stone in a calyceal diverticulum
D: Stone in a calyceal diverticulum
Answer: D: Stone in a calyceal diverticulum 
Explanation: C/I for ESWL are
absoulete

Pregnancy
Bleeding disorder

Relative

Stone > 2cm
Cystine stone
Children
Obstructed stone.