Correct Answer:
B. A notification in the official Gazette
The establishment of a statutory authority in a governmental context is a formal legal process. The correct option, A notification in the official Gazette, signifies the official promulgation and public announcement of the Authority's creation, making it legally binding. This is the standard method for bringing an act into force or establishing a body under law.
- A resolution of the Provincial Assembly is a legislative step, often preceding an act, but doesn't directly establish the Authority.
- An order of the Chief Minister or A decree of the Governor are executive actions, which, while powerful, typically require a formal gazette notification for the establishment of a statutory body to ensure transparency and legal validity.