If $$x = \frac{{\sqrt 5- \sqrt 3 }}{{\sqrt 5+ \sqrt 3 }}$$and $$y = \frac{{\sqrt 5+ \sqrt 3 }}{{\sqrt 5- \sqrt 3 }}$$then the value of $$\frac{{{x^2} + xy + {y^2}}}{{{x^2} - xy + {y^2}}} = ?$$

• A. $\frac{{65}}{{63}}$$
• B. $\frac{{67}}{{65}}$$
• C. $\frac{{69}}{{67}}$$
• D. $\frac{{63}}{{61}}$$