This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
[{'content': 'Physical Quality of life Index Components \nSelect and explain. \nA. Life expectancy at bih, B. Knowledge, C. Life expectancy at age one, D. Standard of Living', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Components of PQLI:Infant Moality Life expectancy at age oneLiteracyPQLI is scaled from 0 to 100.', 'role': 'assistant'}]