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 of a disease - 
Select and explain. 
A. Is the best measure of disease frequency in etiological studies, B. Can only be determined by a coho study, C. Is the number of new cases in a defined population, D. Describes the balance between incidence, moality and recovery
D: Describes the balance between incidence, moality and recovery
Answer: D: Describes the balance between incidence, moality and recovery 
Explanation: Ref : Parks 23rd edition pg 61 Prevalence values describe the balance between incidence, moality and recovery. Increased incidence can increase prevalence. Increased moality decreases prevalence. Increased recovery also decreases prevalence. Note : Incidence is the best measure of disease frequency in etiological studies (coho study)