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': 'Regarding the normal curve, true is/are-a) Both limbs of the curve touch the baselineb) Curve is bilaterally symmetricalc) There is a skew to the rightd) There is a skew to the lefte) Mean, Median, Mode coincide \nSelect and explain. \nA. be, B. ad, C. bc, D. ce', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Confidence limit of normal curve can never be 100%; therefore, limbs of curve never touch the baseline.\nMean, Median and mode all coincide → No skew.', 'role': 'assistant'}]