Which expression is equivalant to the following complex fraction

Answer with explanation:
[tex]\frac{\frac{1}{x}-\frac{1}{y}}{\frac{1}{x}+\frac{1}{y}}\\\\=\frac{\frac{y-x}{yx}}{\frac{y+x}{yx}}\\\\=\frac{y-x}{y+x}[/tex]
None of the Option