(a) where the decree to be executed has been passed in the exercise of appellate jurisdiction, the Court of first instance, and

(b) where the Court of first instance has ceased to exist or to have jurisdiction to execute it, the Court which, if the suit wherein the decree was passed was instituted at the time of making the application for the execution of the decree, would have jurisdiction to try such suit.

[See section 37, the Civil Procedure Code, 1908 (Act No. V of 1908)].