question: Q:A 76-year-old woman with hypertension and coronary artery disease is brought to the emergency department after the sudden onset of right-sided weakness. Her pulse is 83/min and blood pressure is 156/90 mm Hg. Neurological examination shows right-sided facial drooping and complete paralysis of the right upper and lower extremities. Tongue position is normal and she is able to swallow liquids without difficulty. Knee and ankle deep tendon reflexes are exaggerated on the right. Sensation to vibration, position, and light touch is normal bilaterally. She is oriented to person, place, and time, and is able to speak normally. Occlusion of which of the following vessels is the most likely cause of this patient's current symptoms?? 
  {'A': 'Ipsilateral anterior cerebral artery', 'B': 'Anterior spinal artery', 'C': 'Contralateral middle cerebral artery', 'D': 'Ipsilateral posterior inferior cerebellar artery', 'E': 'Contralateral lenticulostriate artery'},