This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Recall bias is most commonly associated with which study design- 
Select and explain. 
A. Case control study, B. Coho study, C. Coho case control study, D. Cross sectional study
A: Case control study
Answer: A: Case control study 
Explanation: .<p>1`when cases and controls are asked questions about their past history,it may be more likely for the cases to recall the existence of ceain events or factors,than the controls who are healthy individuals.cases may have a different recall of past events than controls.</p><p>ref;park&;s textbook of preventive and social medicine,22 nd edition,pg no 71</p>