With which of the following electronic c...

With which of the following electronic configuration of an atom has the lowest ionization enthalpy:

A

`1s^2 2s^2 2p^5 `

B

`1s^2 2s^2 2p^3 `

C

`1s^2 2s^2 2p^5 3s^1 `

D

`1s^2 2s^2 2p^6 `

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The correct Answer is:

C

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