This question highlights a distinction in procedural rules based on the nature of the complainant. The correct answer is 'An Officer/Employee on behalf of the Authority'. When a complaint is filed by an official representing an Authority, it often signifies a matter of public interest or institutional mandate. In such cases, the absence of a specific individual officer typically does not lead to dismissal for default, as the Authority itself is the complainant and can assign another representative or the matter holds public importance.
'A private citizen': A private citizen's complaint is generally dismissed if they fail to appear, as their personal interest is paramount.
'A whistle-blower': While protected, a whistle-blower's absence as the sole complainant might still lead to dismissal if they fail to appear without cause.
'A representative': A representative acts on behalf of another; if the principal complainant (who the representative represents) fails to appear, the case might still be dismissed.