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

  • A$I$ and $II$ only
  • B$I$ and $III$ only
  • C$I, II$ and $III$
  • D$III$ only
JEE MAIN 2019, Difficult
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