The electronic configurations of four elements are given below. Arrange these elements in the correct order of the magnitude (without sign) of their electron affinity
(i) `2s^(2)2p^(5)` (ii) `3s^(2)3p^(5)`
(iii) `2s^(2)2p^(4)` (iv) `3s^(2)3p^(4)`
Select the correct answer using the codes given below:

Options

A. `3 lt 4 lt 1 lt 2`
B. `2 lt 1 lt 4 lt 3`
C. `1 lt 3 lt 4 lt 2`
D. `3 lt 4 lt 2 lt 1`

Answer

A

Explanation

`3^(rd)` period elements of p - block element have more electron gain enthalpy than `2^(nd)` period element.