A patient is brought to the emergency department (ED) by paramedics after a person standing on the ...

A patient is brought to the emergency department (ED) by paramedics after a person standing on the sidewalk saw him fall on a crowded street. He has a history of alcoholism and is frequently brought to the ED.
 
  The nurse finds the patient to be disoriented; he has periods of being calm mixed with episodes of being disruptive and loud. His vital signs are the following: BP 138/84; pulse 135, regular and strong; respiratory rate 22; temperature 37.1C (98.1F). What electrolyte imbalance might the nurse suspect?
  1) Hypomagnesemia
  2) Hypocalcemia
  3) Hyperkalemia
  4) Hypernatremia