does ib acio has negative marking

Correct option is A

Yes, the IB ACIO Tier-I exam has negative marking. For each incorrect answer, ¼ mark (0.25) is deducted from the total score. This negative marking is applicable only in the objective-type Tier-I paper, which tests General Awareness, Reasoning, Quantitative Aptitude, and English. There is no negative marking in Tier-II or the interview round. Candidates should avoid blind guessing, as excessive wrong answers can impact the overall score significantly.