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: Dental
[{'content': 'Anterior arch width of the dental arches increases upto the age of: \nSelect and explain. \nA. 6 to 8 years, B. 10 to 12 years, C. 12 to 14 years, D. 14 to 16 years', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Arch width increase occurs mostly during the eruption of the permanent incisors and reach its maximum size at the time of exfoliation of the primary cuspids.\nThe eruption of the permanent incisors occurs between\xa06 to 8 years.\nReference: Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities 3rd O P Kharbanda, pdf no 482', 'role': 'assistant'}]