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
The following is true about bladder stones - 
Select and explain. 
A. Girls more than boys, B. Treatment is lithopexy, C. Always forms in kidneys and passes down to bladder, D. Usually asymptomatic
B: Treatment is lithopexy
Answer: B: Treatment is lithopexy 
Explanation: None