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
Coho study is better than case control study in all ways except - 
Select and explain. 
A. Greater comparability, B. Lesser time spent, C. Prospective analysis, D. Less Bias
B: Lesser time spent
Answer: B: Lesser time spent 
Explanation: Ans. is 'b' i.e., Lesser time spent o Coho study is more time consuming. o Coho study is prospective study. o Chances of bias are high in case-control study.