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
The concept of social medicine was first introduced by 
Select and explain. 
A. Neumann and Virchow, B. Robe Grotjahn, C. John Ryle, D. Rene Sand
A: Neumann and Virchow
Answer: A: Neumann and Virchow 
Explanation: The seeds that medicine is a social science were sown in 19th century by pioneers such as Neumann and Virchow Ref : Park's Textbook of Preventive and Social Medicine; 23rd edition