This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'While analysing a data, allocation into similar groups is done to ensure - \nSelect and explain. \nA. Comparability, B. Accuracy, C. Validity, D. Sensitivity', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Comparability o Both groups (study and control) should be comparable in respect of all the possible varibles, which may influence the outcome. o So that, except for the factor under study will not influence the outcome confoundation and bias can be minimized.", 'role': 'assistant'}]