<prompt> Example of case control study risk factor and diseaseoutcome ?Maternal smoking and congenital malformationVaginal adenocarcinoma and intrauterine exposure to DESThalidomide exposure and teratogenicityAll of the above  <response>: Ans. is d i.e., All of the above Impoant risk factors and their outcomesdiseases 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. 