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
The following is true about prevalence and incidence - 
Select and explain. 
A. Both are rates, B. Prevalence is a rate but incidence is not, C. Incidence is a rate but prevalence is not, D. Both are not rates
C: Incidence is a rate but prevalence is not
Answer: C: Incidence is a rate but prevalence is not 
Explanation: Incidence
Incidence = No of new cases during a given time period / Population at risk during that period x 100

Numerator (new cases) is a part of denominator (population at risk including those who have developed disease, i.e. the cases).
Time period is specified
Multiplier is 1000


All are features of rate, so incidence is a rate.

Prevalence → Prevalence is proportion.