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': 'The bottle feeding should be discontinued by the age of: \nSelect and explain. \nA. 12 months, B. 8 months, C. 18 months, D. 20 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Prolonged bottle feeding more than 1 year can lead to ECC.', 'role': 'assistant'}]