This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra and penis, Subject name: Surgery
[{'content': 'Acute urinary retention in a male child may be due to: \nSelect and explain. \nA. Prostatic radiotherapy, B. Urethral stricture, C. Hysteria, D. Meatal ulcer with scabbing', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Acute urinary retention in a male child may be due to local inflammatory causes like meatal ulcer with scabbing. Etiology of urinary retention in children Neurological processes (17%) Severe voiding dysfunction (15%) UTI (13%) Constipation (13%) Adverse drug effect (13%) Local inflammatory causes (7%) Locally invading neoplasms (6%) Benign obstructing lesions (6%) Idiopathic (6%) Combined UTI and constipation (2%) Incarcerated inguinal hernia (2%)', 'role': 'assistant'}]