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
[{'content': 'True statement regarding Prevalence: \nSelect and explain. \nA. Cannot be used to determine the health needs of a community, B. Independent of incidence, C. Independent of duration, D. Measures all cases', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (Refer: K. Park’s Textbook of Preventive and Social medicine, 24th edition, pg no: 66, 67)\n\nIncidence = New cases\nPrevalence = New + Old cases\nPrevalence = Incidence X Duration', 'role': 'assistant'}]