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': 'The incidence rate of a disease is 5 times greater in women than in men, but the prevalence rates show no sex difference. The best explanation is that: \nSelect and explain. \nA. The case fatality rate for this disease is lower in women, B. The case fatality rate for this disease is higher for women, C. The duration of disease is shorter in men, D. Risk factors for developing the disease are more common in women', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Prevalence depends upon\xa02\xa0factors,\xa0the incidence\xa0and duration of illness. Given the assumption that the population is stable,\xa0and\xa0 incidence\xa0and\xa0duration\xa0are\xa0unchanging,\xa0the relationship\xa0between\xa0incidence\xa0and\xa0prevalence\xa0can\xa0be expressed as:\xa0\nPrevalence = Incidence x\xa0 Mean duration\xa0\nNote:\nIn the given question, if incidence for a disease is 5 times higher\xa0among females, but prevalence rate shows no sex difference, since P = I × d, thus, d (duration of disease) must be lower among females.\n\nEither the disease is more fatal among females or\nDisease is easily curable among females.', 'role': 'assistant'}]