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
A 23 year old presented with fever with chills and back pain. He also complained about increased frequency of voiding. USG examination reveals that bladder stones. All of the following are true about bladder stones, EXCEPT: 
Select and explain. 
A. Rare in Indian children, B. Most bladder calculi are seen in men, C. Small stones can be removed per urethra, D. Solitary bladder stone is the rule
A: Rare in Indian children
Answer: A: Rare in Indian children 
Explanation: Primary vesical calculi are rare in the United States but are common in Southeast Asia and the Middle East. Most bladder calculi are seen in men. In developing countries, they are frequently found in prepubescent boys. Stone analysis frequently reveals ammonium urate, uric acid, or calcium oxalate stones. A solitary bladder stone is the rule, but there are numerous stones in 25% of patients. Patients present with irritative voiding symptoms, intermittent urinary stream, urinary tract infections, hematuria, or pelvic pain. Small stones can be removed or crushed transurethrally (cystolithalopaxy). Ref: Cooper C.S., Joudi F.N., Williams R.D. (2010). Chapter 38. Urology. In G.M. Dohey (Ed), CURRENT Diagnosis & Treatment: Surgery, 13e.