Solution
The correct option is D.
$$\left({\sqrt{3}}-\frac{{1}}{\sqrt{3}}\right)^{2}$$
=$$\left(\frac{{3-1}}{\sqrt{3}}\right)^{2}$$
=$$\left(\frac{{2}}{\sqrt{3}}\right)^{2}$$
After squaring
=$$\left(\frac{{4}}{{3}}\right)$$
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