This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Prevalence is a 
Select and explain. 
A. Rate, B. Ratio, C. Propoion, D. Mean
C: Propoion
Answer: C: Propoion 
Explanation: Ref: Parks 23rd edition pg 61 Prevalence is a propoion. Time is not mentioned. Point prevalence of a disease is defined as the number of all current cases (old and new) of a disease at one point of time, in relation to a defined population.