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a
Cl > F > O > P > N
b
Cl > O > F > N > P
c
F> Cl > O >N > P
d
Cl > F > O > N > P
answer is A.
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Detailed Solution
Electron affinity of 3rd period element is higher than 2nd period element in respective group because in atoms of 2nd period electron electron-electron repulsion arises more on accepting electron.