Chemistry - Atomic Structure Question with Solution | TestHub

Given below are two statements :
Statement ($\mathbf{I}$): The radii of isoelectronic species increases in the order.
${\mathrm{Mg}}^{2+}<{\mathrm{Na}}^{+}<{\mathrm{F}}^{-}<{\mathrm{O}}^{2-}$
Statement (II): The magnitude of electron gain enthalpy of halogen decreases in the order.
$\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}$
In the light of the above statements, choose the most appropriate answer from the options given below :