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: Dental
[{'content': 'Strong correlation is signified by a correlation coefficient of: \nSelect and explain. \nA. Zero, B. 1, C. Less than 1, D. More than 1', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CORRELATION COEFFICIENT (R):\n\nMeasures the degree or strength of relationship in a correlation (relationship between 2 quantitative or continuous variables).\nCorrelation coefficient (r) lies between: –1 to +1 (–1 < r < +1)\nStrength of correlation:\n\n\nWeak positive correlation: 0 < r < 0.3\nModerate positive correlation: 0.4 < r < 0.6\nStrong positive correlation: r > 0.7', 'role': 'assistant'}]