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
Prevalence is a- 
Select and explain. 
A. Rate, B. Ratio, C. Propotion, D. Mean
C: Propotion
Answer: C: Propotion 
Explanation: Ans. is 'c' i.e., Propoion