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: Pediatrics
[{'content': 'Baby is bed-dry at age of: March 2013 (g) \nSelect and explain. \nA. 3 years, B. 4 years, C. 5 years, D. 6 years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. 5 years More than 85% children will have complete diurnal and nocturnal control by 5 years of age', 'role': 'assistant'}]