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': 'Which of the following is the contribution of Germany to public health? \nSelect and explain. \nA. Socialization, B. Pasteurization, C. Development of baths, sewers, aqueducts for sanitation, D. Instituting compulsory sickness insurance', 'role': 'user'}, {'content': "Answer: D \nExplanation: Germany led the way by instituting compulsory sickness insurance in 1883 Ref: Park's textbook of preventive and social medicine; 23rd edition", 'role': 'assistant'}]