Randomization:
Ans. (b) It is the Procedure by which participants are allocated into groups usually called 'study' and 'control' groupRef: K. Park 23rd ed. / 82, 21st ed. /78* Randomization is "heart" of a control trial. It is a statistical procedure by which the participants are allocated into groups usually called "study" and "control" group.* It is an attempt to eliminate bias and allow comparability.* By doing this it is ensured that investigator has NO control over allocation of participants to study or control group. THIS REMOVES SELECTION BIAS.* RANDOMIZATION is done only after the participant has entered the study, i.e. after having been qualified for the trial and has given his informed consent to participate in the study.