This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiological Study, Subject name: Social & Preventive Medicine
Point prevalence of a chronic disease is studied best by: 
Select and explain. 
A. Case control study, B. Cross sectional study, C. Historical cohort, D. Cohort
B: Cross sectional study
Answer: B: Cross sectional study 
Explanation: Ans: B (Cross sectional study) Ref: Textbook of Preventive and Social Medicine, K. Park, 22nd edition page no 59Explanation:* Prevalence is an important measure of burden of disease in the community at a point of time or during a period of time. Accordingly they are called point prevalence and period prevalence.