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': 'Living standard of people is best assessed by? \nSelect and explain. \nA. Infant moality rate, B. Maternal moality, C. Physical quality of life index, D. Death rate', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Physical quality of life index", 'role': 'assistant'}]