This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
[{'content': 'If neonatal death 450, stillb ibh 212, total live bih 12450, what is the NMR? \nSelect and explain. \nA. 17, B. 36, C. 64, D. 92', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Neonatal moality rate= number of deaths of children under 28 days of age in a year/total live bihs*1000 =450/12450*1000 =36', 'role': 'assistant'}]