If $$a = \frac{{\sqrt 5+ 1}}{{\sqrt 5- 1}}$$& $$b = \frac{{\sqrt 5- 1}}{{\sqrt 5+ 1}}{\text{,}}$$then the value of $$\frac{{{a^2} + ab + {b^2}}}{{{a^2} - ab + {b^2}}}{\text{ is?}}$$

• A. $\frac{3}{4}$$
• B. $\frac{4}{3}$$
• C. $\frac{3}{5}$$
• D. $\frac{5}{3}$$