7.The aforementioned question raised by the learned advocate for the appellant is no more res integra, inasmuch as the very question is decided by a three-Judge Bench of this Court, in Chandi Prasad v. Jagdish Prasad [Chandi Prasad v. Jagdish Prasad, (2004) 8 SCC 724] , wherein it was observed that in terms of Article 136, Limitation Act, 1963, a decree can be executed when it becomes enforceable. A decree is defined in Section 2(2) CPC, 1908 to mean the formal expression of an adjudication which, so far as regards the court expressing it, conclusively determines the rights of the parties with regard to all or any of the matters in controversy in the suit and may be either preliminary or final. A decree within the meaning of Section 2(2) CPC would be enforceable irrespective of whether it is passed by the trial court, the first appellate court or the second appellate court. When an appeal is prescribed under a statute and the appellate forum is invoked and entertained, for all intents and purposes, the suit continues. When a higher forum entertains an appeal and passes an order on merit, the doctrine of merger would apply. The doctrine of merger is based on the principles of the propriety in the hierarchy of the justice delivery system. The doctrine of merger does not make a distinction between an order of reversal, modification or an order of confirmation passed by the appellate authority. The said doctrine postulates that there cannot be more than one operative decree