The first `(Delta_IH_1)` and second `(Delta_IH_2)` ionisation enthalpies (in kJ `"mol"^(-1)`) and the `(Delta_(eg)H)`

The first `(Delta_IH_1)` and second `(Delta_IH_2)` ionisation enthalpies (in kJ `"mol"^(-1)`) and the `(Delta_(eg)H)` electron gain enthalpy (in kJ `"mol"^(-1)`) of a few elements are given below:

The least reactive element is :
A. P
B. Q
C. R
D. T

The first `(Delta_IH_1)` and second `(Delta_IH_2)` ionisation enthalpies (in kJ `"mol"^(-1)`) and the `(Delta_(eg)H)` electron gain enthalpy (in kJ `"

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