Nothin has been organised properly and confuision seems inevitable.

Answer: Option C

Inevitable : certain to happen; unavoidable.
Uncertain : not able to be relied on; not known or definite.
Ineligible : legally or officially unable to be considered for a position or benefit.
Certain : able to be firmly relied on to happen or be the case.
Inefficient : not achieving maximum productivity; wasting or failing to make the best use of time or resources.

Antonym of Inevitable is Uncertain