<prompt> False about Randomised Control Trials isRandomisation is done while selecting subjects for the studyResults of attrition are included in the analysisDouble blinding is the most common form of blinding observedCross-over design helps removing ethical concerns  <response>: The essential purposes of randomization in a randomized controlled trial are:- Participants have Equal and Known Chance of falling into either Experimental Group or Reference Group- To eliminate Selection Bias Selection Bias or Susceptibility Bias is the bias due to differential susceptibility of two groups to outcome, even before interventionexperiment is performed; Thus two groups are not comparable- To ensure comparability among two groups- To have similar prognostic factors among two groups- Randomisation is done while dividing patients into the Experimental Intervention Group and the Reference Group AND not while selecting patients for RCT- Randomisation is known as Heart of a trial- Randomisation is superior to Matching. 