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.

• Correct answer
  A

  II
• B

  I
• C

  IV
• D

  III

Hence, the correct answer is option: 'A'.