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': 'Most number of false positives by a screening test is because of?a)  High specificityb)  High sensitivityc)  High prevalenced)  Low prevalence \nSelect and explain. \nA. c, B. d, C. ab, D. bd', 'role': 'user'}, {'content': 'Answer: D \nExplanation: If a population has more false positive cases : -\n\n\nScreening test is more sensitive\nPositive predictive value of the test is low.\nPrevalence of disease is low.\n\n\n\nIf a population has more false negative cases\n\ni)\xa0\xa0 Screening test is more specific\nii)\xa0 Negative predictive value of the test is low', 'role': 'assistant'}]