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': '4050 births in a year in a city out of which 50 were still births. 50 died in first 7 days while another 150 died in first 28 days. What is the Neonatal mortality rate of the city? \nSelect and explain. \nA. 0.5, B. 0.625, C. 0.05, D. 0.125', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]