A 64-year-old man comes to the physician for a 4-month history of loose stools and swelling of his ankles. He drinks a pint of vodka daily. Laboratory studies show an MCV of 108 fL. Which of the following combinations of electrolytes (in mEq/L) are most likely to be seen in this patient?
Na+ 132; K+ 3.1
Na+ 132; K+ 4.9
Na+ 140; K+ 4.0
Na+ 148; K+ 3.1
Na+ 148; K+ 4.9
