Concept:The Public Service Commission manages government personnel matters, not public finance.
Explanation:The Public Service Commission is responsible for recruitment, promotion, discipline, and welfare of civil servants.
These duties cover options B, C, and D.
Imposition of income tax is a fiscal or revenue function.
It is carried out by tax authorities such as the Federal Inland Revenue Service.
It is not a function of the Public Service Commission.
Answer:A. imposition of income tax