This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
a known case of COPD with acute exacerbation of copd is managed in icu following is not true ? 
Select and explain. 
A. NIV is not indicated, B. o2 inhalation, C. salbutamol inhalation, D. iv dexamethasone
A: NIV is not indicated
Answer: A: NIV is not indicated 
Explanation: Role of NIV in Treating Acute COPD * Preferred therapy for exacerbations of COPD in the acute setting Respiratory acidosis: * PaCO2?_ 45 mmHg (6.0 kPa) * Aerial pH 7.35 * Improves oxygenation, increases pH, and decreases PaCO2 * Decreases respiratory rate, work of breathing (can help overcome auto-PEEP), and severity of breathlessness - Success rates up to 85% ref : willey 10th ed