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: Unknown
True statement regarding Prevalence: 
Select and explain. 
A. Cannot be used to determine the health needs of a community, B. Independent of incidence, C. Independent of duration, D. Measures all cases
D: Measures all cases
Answer: D: Measures all cases 
Explanation: (Refer: K. Park’s Textbook of Preventive and Social medicine, 24th edition, pg no: 66, 67)

Incidence = New cases
Prevalence = New + Old cases
Prevalence = Incidence X Duration