If $R_e\bigg(\large\frac{z-8i}{z+6}\bigg)$$=0$, then $z$ lies in the curve

Question

$\begin{array}{1 1} (A) x^2+y^2+6x-8y=0 \\ (B) x^2+y^2+6x+8y=0 \\ (C) x^2+y^2-6x-8y=0 \\ (D) x^2+y^2-6x+8y=0 \end{array} $