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': 'For international comparison, the WHO expert committee defines ‘still birth’ as birth of dead and under weight of fetus more than _____ \nSelect and explain. \nA. 500, B. 2000, C. 1500, D. 1000', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]