question: Q:A 74-year-old right-handed woman was referred to the hospital due to concerns of a stroke. In the emergency department, the initial vital signs included blood pressure of 159/98 mm Hg, heart rate of 88/min, and respiratory rate of 20/min. She exhibited paucity of speech and apathy to her condition, although she complied with her physical examination. The initial neurologic evaluation included the following results:
  Awake, alert, and oriented to person, place, and time
  No visual field deficits
  Right-sided gaze deviation with full range of motion with doll’s head maneuver
  No facial asymmetry
  Grossly intact hearing
  No tongue deviation, equal palatal elevation, and good guttural sound production
  Absent pronator or lower extremity drift
  Decreased sensation to light touch on the right leg
  Normal appreciation of light touch, pressure, and pain
  Normal proprioception and kinesthesia
  Manual muscle testing:
  5+ right and left upper extremities
  5+ right hip, thigh, leg, and foot
  3+ left hip and thigh
  2+ left leg and foot
  A head computed tomography (CT) scan and a head magnetic resonance imaging (MRI) confirmed areas of ischemia. Which artery is the most likely site of occlusion?? 
  {'A': 'Right anterior cerebral artery', 'B': 'Right middle cerebral artery stem (M1)', 'C': 'Superior division of the right middle cerebral artery', 'D': 'Inferior division of the right middle cerebral artery', 'E': 'Inferior division of the left middle cerebral artery'},