This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disease Causation, Measurements, Milestones, Subject name: Social & Preventive Medicine
[{'content': 'Select true statement regarding propoion:- \nSelect and explain. \nA. Numerator is not a pa of denominator, B. Numerator is pa of denominator and always expressed as percentage, C. Numerator is pa of denominator and not expressed as percentage, D. Numerator is not a pa of denominator and always expressed as percentage', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Propoion = a/b X 100. numerator (a) is pa of Denominator (b). always expressed in percentage. Examples:Prevalence of disease, Case fatality Rate are also propoion.', 'role': 'assistant'}]