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': 'Breastfeeding should be stopped at what age of the child: \nSelect and explain. \nA. 1.5 years., B. 2.5 years, C. 3 years., D. 4 years.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Breastfeeding should be stopped at 1.5 years of age.', 'role': 'assistant'}]