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# Number of $K^+$ ions present in one litre of M/5 $KMnO_4$ solution are :

$\begin{array}{1 1}(a)\;10\times 10^{24}&(b)\;1.204\times 10^{23}\\(c)\;6.02\times 10^{23}&(d)\;3.01\times 10^{24}\end{array}$