This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiological Study, Subject name: Social & Preventive Medicine
The study for correlation of genetic disease to consanguinity - 
Select and explain. 
A. Case Contral Study, B. Cohort study, C. Cross-sectional study, D. Case report
A: Case Contral Study
Answer: A: Case Contral Study 
Explanation: Ans. is 'a' i.e., Case Control Study " The association of consanguinity with complex disorders can be studied using different approaches. For example, epidemialogial surveys could compare the frequency of a disorder in the progeny offirst cousin parents with that of unrelated parents, whereas case-control studies could compare the rates of first cousins among affected individuals and controls".