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: Social & Preventive Medicine
[{'content': 'Breast feeding done after child birth should be \nSelect and explain. \nA. ASAP or within half an hour, B. ASAP or within one hour, C. ASAP or within four hours, D. ASAP or within 6 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]