If \( \mathrm{x}=\frac{2}{\sqrt{3}-\sqrt{5}} \) and \( y=\frac{2}{\sqrt{3}+\sqrt{5}} \) then \( ...

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If \( \mathrm{x}=\frac{2}{\sqrt{3}-\sqrt{5}} \) and \( y=\frac{2}{\sqrt{3}+\sqrt{5}} \) then \( x+y= \)
a. 3
b. \( 4 \sqrt{3} \)
c. \( -2 \sqrt{3} \)
d. 6
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