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: Social & Preventive Medicine
[{'content': 'Example of case control study (risk factor and disease/outcome) ? \nSelect and explain. \nA. Maternal smoking and congenital malformation, B. Vaginal adenocarcinoma and intrauterine exposure to DES, C. Thalidomide exposure and teratogenicity, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., All of the above Impoant risk factors and their outcomes/diseases which have been studied by case-control study are :- Cigarette smoking and lung cancer. Maternal smoking and congenital malformation. Radiation and leukemia. OCP used and hepatocellular carcinoma. Herpes-simplex and Bells palsy. Aificial sweeteners and bladder cancer. DES exposure in fetal life and vaginal adenocarcinoma. OCP use and thromboembolic disease. Thalidomide use in pregnancy and teratogenicity.", 'role': 'assistant'}]