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
Which of the following is the contribution of GERMANY to public health - 
Select and explain. 
A. Socialization, B. Pasteurization, C. Development of baths, sewers, aqueducts for sanitation, D. Instituting compulsory sickness insurance
D: Instituting compulsory sickness insurance
Answer: D: Instituting compulsory sickness insurance 
Explanation: Ans. is 'd' i.e., Instituting compulsory sickness insurance