Normal ABG values are pH 7.35–7.45, PaCO2 35–45, HCO3 22–26. Option A indicates acidosis (pH < 7.35) due to low HCO3, consistent with Diamox’s effect, and the low PaCO2 shows compensation. Option B is normal, C shows alkalosis, and D is incomplete and inconsistent with symptoms. The patient’s confusion, fatigue, and headaches align with metabolic acidosis.