If the radius of a circle is decreased by $x\%$ then the radius of that circle increases by _________

Question

$\begin{array}{1 1} \bigg[ 2x - \bigg(\large\frac{x}{10}\bigg)^2\bigg]\% \\ \bigg[ 2x - \bigg(\large\frac{x}{5}\bigg)^2\bigg]\% \\ \bigg[ 2x + \bigg(\large\frac{x}{10}\bigg)^2\bigg] \% \\ none\;of\;these \end{array} $