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': 'All of the following are example of Ratios except \nSelect and explain. \nA. Relative risk, B. Incidence, C. Sex ratio, D. Maternal moality ratio', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tools of measurement in epidemics: Rate = x 1000/ 10000/ 100000 ; a is pa of b Ratio = a/b ; a is not a pa of b Propoion = x 100 = % ; a is pa of b - Eg: Rate Ratio Propoion IMR Incidence Crude death rate MMR Sex ratio Relative risk Prevalence Case fatality rate Survival rate Propoional moality rate', 'role': 'assistant'}]