This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Best method to remove confounding is \nSelect and explain. \nA. Randomization, B. Restriction, C. Stratified randomization, D. Multivariate analysis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Method Utility to control confounding Randomization 2nd best method Restriction Limiting study to people who have paicular characteristics Matching Mostly useful in case control studies, MC used method Stratification Useful for larger studies Statistical modeling When many confounding variables exist simultaneously Stratified randomization Best method', 'role': 'assistant'}]