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
[{'content': 'Prevalance is given by which study? \nSelect and explain. \nA. Case-control study, B. Cohort study, C. Cross-sectional study, D. Correlation study', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Cross-sectional study CharacteristicsCohort StudyCase control StudyCross Sectional StudyDesignProspectiveRetrospectiveOne point in timeIncidenceEstimatedNot estimatedNot estimatedPrevalenceNot estimatedNot estimatedEstimatedCalculationso Incidence rateso Relative risko Attributable risko Odds ratio", 'role': 'assistant'}]