Biological importance of Na and K

2015 AIPMT-I 1 question

1. 1 The s-Block Elements
   The function of ''Sodium pump'' is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?
   A $Ca^{2+}$ B $Mg^{2+}$ C $K^+$ D $Fe^{2+}$
   Check Answer