This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
Evidence based medicine, which of the following is not 
Select and explain. 
A. Personal Exposure, B. RCT, C. Case repo, D. Meta analysis
A: Personal Exposure
Answer: A: Personal Exposure 
Explanation: .