Find the slope of the tangent to the curve $\normalsize y =\large { \frac{x-1}{x-2},} \normalsize x \neq 2\; at\;x = 10$

Question

$\begin{array}{1 1} (A)\;\large\frac{1}{64} \\ (B)\;\large\frac{-1}{64} \\ (C)\; 64 \\ (D)\;-64 \end{array} $