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': 'Perinatal moality is expressed in terms of ? \nSelect and explain. \nA. Deaths/1000 total bihs, B. Deaths/1000 live bihs, C. Deaths/10000 total bihs, D. Deaths/10000 live bihs', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Deaths/1000 live bihs", 'role': 'assistant'}]