The correct statement(s) among I to III ...

The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/ are :
I. They activate many enzymes
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions, they are responsible for the transmission of nerve signals

I,II and III

I and III only

III only

I and II only

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