Observe the following data ( \(\Delta_i \mathrm{H}_1, \Delta_i \mathrm{H}_2\) and \(\Delta_{\text {eg }} \mathrm{H}\) represent the first, second ionisation enthalpies and electron gain enthalpy respectively).

Element	\(\begin{gathered}\Delta_i \mathrm{H}_1 \\ \left(\mathrm{~kJ}\mathrm{~mol}^{-1}\right)\end{gathered}\)	\(\begin{gathered}\Delta_i \mathrm{H}_2 \\ \left(\mathrm{~kJ}\mathrm{~mol}^{-1}\right)\end{gathered}\)	\(\begin{gathered}\Delta_{\text{eg}}\mathrm{H}\\ \left(\mathrm{kJ}\mathrm{mol}^{-1}\right)\end{gathered}\)
I	\(520\)	\(7300\)	\(-60\)
II	\(490\)	\(3051\)	\(-48\)
III	\(1681\)	\(3374\)	\(-328\)
IV	\(2372\)	\(5251\)	\(+48\)

Using the data identify the most reactive metal.

1. A II
2. B I
3. C IV
4. D III