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 FIRST country to socialize medicine completely? 
Select and explain. 
A. India, B. Russia, C. USA, D. Germany
B: Russia
Answer: B: Russia 
Explanation: Russia is the first country to socialize medicine completely and to give all its citizens a constitutional right to health services. Ref: Park, 21st Edition, Page 9.