If a $$\cot \theta = b$$, then what will be the value of $$\frac{b \cos \theta - a \sin \theta}{b \cos \theta + a \sin \theta}$$?

A

$$\frac{b^{2} + a^{2}}{b^{2} - a^{2}}$$

B

$$b^{2} + a^{2}$$

C

$$\frac{b^{2} - a^{2}}{b^{2} + a^{2}}$$

D

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