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
[{'content': 'The type of study that determines the norms and limits of the distribution of variables, including the characteristics of the events and population under study, is reffered to as- \nSelect and explain. \nA. Explanatory, B. Cross-sectional, C. Descriptive, D. Analytical', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Descriptive studies are the first phase of an epidemiological investigation. Procedures in descriptive studies include: 1)defining the population to be studied 2)defining the disease under study 3)describing the study by time , place, person 4)measurement of disease 5)comparing with known indices 6)formulation of an aetiological hypothesis (refer pgno:63 park 23 rd Edition)', 'role': 'assistant'}]