This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiological Study, Subject name: Social & Preventive Medicine
[{'content': 'Selection bias can be eliminated by? \nSelect and explain. \nA. Randomization, B. Single blinding, C. Double blinding, D. Matching', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) RandomizationREF: Park 20th edition page 68, 69, 70Three key procedures are used to minimize bias in experimental studies: Randomization (against selection bias, blinding (against assessment bias) and a priori definition of the statistical analysis i.e before the results are known (against the analysis bias)(REF: Clinical Research Informatics by Rachel L. Richesson, James E. Andrews Page 68)Two strategies are used to reduce selection bias: allocation concealment and randomization,(REF: Textbook of Interventional Neurology byAdnan I. Qureshi, Alexandros L. Georgiadis 2011 edition Page 456)', 'role': 'assistant'}]