Picture the standard AMTSL bundle and check each option against it. The accepted bundle is: give a uterotonic such as oxytocin right after birth, deliver the placenta with controlled cord traction while guarding the uterus, and then keep the uterus firm with gentle massage. Those three appear in the list as options A, D, and C and are all correct steps.
The one that no longer belongs is immediate clamping, cutting, and ligation of the cord. Current WHO practice favours delayed cord clamping, waiting one to three minutes, because it improves the newborn's iron stores and lowers the risk of anaemia. Routine immediate clamping is therefore not part of recommended active management, which makes option B the answer for part (a).
In the second recall, the listed elements oxytocin, controlled cord traction, and uterine massage are all genuine AMTSL steps; the routine separate ergometrine injection is the relative odd one out in that framing.
So the intervention not recommended in part (a) is immediate clamping and ligation of the cord.
\[\boxed{\text{Immediate clamping, cutting and ligation of cord}}\]