Let the circles $C_{1} : x_{2} + y_{2} = 9$ and $C_{2} : \left(x ??3\right)^{2} + \left(y ??4\right)^{2} = 16$, intersect at the points
X and Y. Suppose that another circle $C_{3} : \left(x ??h\right)^{2} + \left(y ??k\right)^{2} = r^{2}$ satisfies the following conditions:
$\left(i\right) \quad$ centre of $C_{3}$ is collinear with the centres of $C_{1}$ and $C_{2}$,
$\left(ii\right) \quad C_{1}$ and $C_{2}$ both lie inside $C_{3}$, and
$\left(iii\right)\quad C_{3}$ touches $C_{1}$ at M and $C_{2}$ at N.
Let the line through X and Y intersect $C_3$ at Z and W, and let a common tangent of $C_{1}$ and $C_{3}$ be a tangent to the parabola $x^{2} = 8ay.$
There are some expressions given in the List-I whose values are given in List-II below:
Which of the following is the only INCORRECT combination?
