Social & Preventive Medicine General a9099d55 Framingham hea study is? A Case-control study B Coho study C Cross-sectional study D None High-Yield Explanation Ans. is b i.e., Coho study Example of coho sutdies 1) Framingham hea study is a classical example of coho sutdy. 2) Smoking and lung cancer study. 3) Oral contraceptives and health study.