<prompt> In type - II respiratory failure, there is :Low pO2 and low pCO2Low pO2 and high pCO2Normal pO2 and high pCO2Low pO2 and normal pCO2  <response>: Answer is B Low PO2 and high PCO2: Type II respiratory failure or pump failure is characterized by decreased Pa02 and increased PaCO2 as a result of alveolar hypoventilation. There is a fall in minute ventilation which causes a rise in PaCO2 and fall in Pa02. The alveolar aerial gradient PaO2 is normal. Type I Respiratory failure Hypoxemia with decreased PaCO2 Type II Respiratory failure Hypoxemia with increased PaCO2 