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
In a case controlled study. It is found that the disease is more common in the group taking coffee as compared to the control group. The significance of this is - 
Select and explain. 
A. Cause and effect relationship established, B. Disease median can be calculated, C. Caffeine is associated with occurrence of disease, D. Controls will not get the disease
C: Caffeine is associated with occurrence of disease
Answer: C: Caffeine is associated with occurrence of disease 
Explanation: Ans. is 'c' i.e., Caffeine is associated with occurrence of disease Case-control study does not establish the cause and effect relationship because it can not distinguish between cause and associated factors. o Case-control study can only tell the association between cause and effect.