The correct order of electron affinity of B, C, N, O is

O>C>N>B

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B>N>C>O

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O>C>B>N

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O>b>C>N

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Solution

The correct option is C
O>C>B>N

$O 140.9 > C 122.3 > B 83 > N 0$ Value of electron affinity increases on going from left to right in periods but the value of electron affinity of $V^{t h}$ A elements is less than that of $I V^{t h}$ A element, this is due to half filled p-orbitals presence.

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