Which of the following elements is incorrectly paired with its function in a plant?

A)nitrogen-component of nucleic acids, proteins, hormones, coenzymes
B)magnesium-component of chlorophyll; activates many enzymes
C)phosphorus-component of nucleic acids, phospholipids, ATP, several coenzymes
D)potassium-cofactor functional in protein synthesis, osmosis, operation of stomata
E)sulphur-component of DNA; activates some enzymes