Concept:The Public Service Commission is the body responsible for the appointment, promotion, and discipline of public officers.
Explanation:In Nigeria, the Public Service Commission was formally established by the Republican Constitution of 1963.
This constitution created the Federal Public Service Commission as a federal executive body.
It was given the duty of handling appointments, promotions, and disciplinary control over civil servants.
The 1979 Constitution instead created the Civil Service Commission, which is a different body.
Thus, the Public Service Commission is not linked to the 1979, 1989, or 1999 constitutions.
Its legal origin is traced directly to the 1963 Constitution.
Answer:A. The 1963 constitution