Which of the following elements will have the highest second ionization potential in 3d series ?

In 3d series,

$\mathrm{Zn}-\left[\mathrm{Ar}\right]4{\mathrm{s}}^{2}3{\mathrm{d}}^{10},$

Thus zinc has the highest first IP;

${\mathrm{Cu}}^{+}-\left[\mathrm{Ar}\right]3{\mathrm{d}}^{10},$

Thus copper has the highest second IP;