When we have 2 experimental groups (with different treatments) and 1 control group, Is that an RCT or clinical trial or a three-arm Randomized Controlled Trial?
Randomization is the process of choosing and allocating units into various groups. You have a control group and two Exptl. groups which together form 3 arms. Hence RCT with 3 arms.
Randomized control trial is the trial with property randomised into various arms irrespective of number of arms of intervention vs the controlled group.