The LPN/LVN Should Have Some Understanding About Fluid and Electrolyte

The LPN/LVN should have some understanding about fluid and electrolyte balance.Which of the following is a good rule to remember about this concept?

A) Sodium follows potassium,water remains in the cell.
B) Potassium leaves the cell,water remains in the cell.
C) Water remains with potassium in the cell while sodium leaves.
D) Water tends to follow sodium out of the cell.