Question:medium

Levels of evidence for different types of Research studies (Bottom Up Approach):
A. Systematic review of RCTs
B. Case control study
C. Systematic review of case control studies
D. Case series
E. Systematic review of cohort studies
Choose the correct answer from the options given below:

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Hierarchy: Case series → Case-control → Cohort → Systematic reviews → RCT reviews

Updated On: May 22, 2026

B, D, C, E, A
D, B, E, C, A
B, D, E, C, A
C, E, B, D, A

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The Correct Option is B

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