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
Breastfeeding should be stopped at what age of the child: 
Select and explain. 
A. 1.5 years., B. 2.5 years, C. 3 years., D. 4 years.
A: 1.5 years.
Answer: A: 1.5 years. 
Explanation: Breastfeeding should be stopped at 1.5 years of age.