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': 'Case - control study is a type of - \nSelect and explain. \nA. Descriptive epidemiological study, B. Analytical study, C. Longitudinal study, D. Experimental epidemiological study', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . case control studies are generally called "retrospective studies"are used to test casual hypothesis.they are basically comparison studies.cases and controls must be compared with respect to known "confounding factors"other kind of analytical studies include coho study. ref;park&;s textbook of preventive and social medicine,22 nd edition,pg no 66', 'role': 'assistant'}]