19.7Kg of gold was recovered from a smuggler. How many atoms of gold were recovered? ( at. mass. of Au = 197 )

Question

$\begin{array}{1 1}(a)\;100& (b)\;6.02\times 10^{23} \\(c)\;6.02\times 10^{24}&(d)\;6.02\times 10^{25}\end{array}$