A 67-year-old man develops coma over a few minutes. He is unresponsive on arrival to the hospital. He has ataxic respirations and pin-point, reactive pupils. Oculocephalic reflexes are absent. There is no motor response with noxious stimulation.For the above patient with altered level of consciousness, select the most likely diagnosis
basal ganglia hemorrhage cerebellar hemorrhage pontine hemorrhage lobar intracerebral hemorrhage