This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: RCT, Trials, Subject name: Social & Preventive Medicine
Father of Evidence Based Medicine is: 
Select and explain. 
A. Sackett, B. Da vinci, C. Hippocrates, D. Tolstoy
A: Sackett
Answer: A: Sackett 
Explanation: Father of Evidence based medicine (EBM): David Lawrence Sackett founded first Depament of Clinical Epidemiology in Canada, founded Oxford Centre for EBM Wrote books: Clinical Epidemiology Evidence Based Medicine