This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Subject name: Pediatrics
[{'content': "'Nocturnal enuresis' refers to involuntary urination at night beyond the age of? \nSelect and explain. \nA. 2 years, B. 3 years, C. 4 years, D. 5 years", 'role': 'user'}, {'content': "Answer: D \nExplanation: 'Nocturnal enuresis' refers to involuntary urination at night beyond the age of 5 years Normal milestones: 18 months: Dry during daytime 3 years: Dry at night", 'role': 'assistant'}]