This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: RCT, Trials, Subject name: Social & Preventive Medicine
Following is NOT a benefit of Randomization: 
Select and explain. 
A. Reduction of bias in selection of groups, B. Ensure comparability of both groups, C. Facilitates blinding of treatment, D. Increases external validity of study
D: Increases external validity of study
Answer: D: Increases external validity of study 
Explanation: RANDOMISATION IN RCT causes: Reduction of selection bias Ensure comparability of both groups Ensure similar prognostic factors in both groups Facilitates blinding of treatment Increases Internal validity of study. Hence option-4 is answer.