<prompt> Administration of pure O2 to hypoxic patients is dangerous becauseApnea occurs due to hypostimulation of peripheral chemoreceptorsPulmonary edemaDPGConvulsions  <response>: The respiratory centres maybe depressed in hypercapnic patients. Breathing may only be occurring due to the activation of peripheral chemoreceptors sensitive to the hypoxia. When pure Oxygen is given to the patients, the stimulus to the peripheral receptors is gone and may result in apnoea. 