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
Best-know large sample study programme for coronary heart disease is 
Select and explain. 
A. North kerelia study, B. Framingham study, C. Standford study, D. Oxford study
B: Framingham study
Answer: B: Framingham study 
Explanation: None