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 analyzing 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: Both groups (study and control) should be comparable in respect of all the possible varibles, which may influence the outcome.\nSo that, except for the factor under study will not influence the outcome → confoundation and bias can be minimized.', 'role': 'assistant'}]