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': '18, 20, 22, 24,26, 28 and 30...Best central tendency is determined by: \nSelect and explain. \nA. Mean, B. Media, C. Mode, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. MeanIN DISTRIBUTION WITH EXTREME VALUE (OUTLIERS)Most affected measure of central tendency: MeanLeast affected measure of central tendency: ModeMost preferable measure of central tendency: Median', 'role': 'assistant'}]