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': 'Millenium development Goals aim to achieve reduction in MMR by: \nSelect and explain. \nA. 3-Jan, B. 3-Feb, C. 4-Jan, D. 4-Mar', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 4-Mar', 'role': 'assistant'}]