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
The number of new cases occuring in a defind population during a specified period of time is called 
Select and explain. 
A. Period prevalence, B. Point prevalence, C. Prevalence, D. Incidence
D: Incidence
Answer: D: Incidence 
Explanation: Incidence is defined as the number of new cases occurring in a defined population during a specified period of time.incidence rate refers only to new cases,during a given period and also in a specified population or population at risk.ref:parks textbook of preventive and social medicine,22 nd edition,pg no 58