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When is the odds ratio obtained in a case-control study a good estimate of the relative risk? A. The exposure distribution among cases is representative of all persons with disease. B The exposure distribution among controls is representative of all people without the disease in the population from which the cases were drawn. C The disease under investigation is rare in the population

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Answer:

A. The exposure distribution among cases is representative of all persons with disease.

Explanation:

The case control study tries and compares two different populations where the disease has been present, because of that if the disease under investigation is strange or rare in one of the populations that would affect negatively the study, the best option would be is the exposure distribution among cases is representative of all persons with the disease.