The correct order of atomic radii is :
$\mathrm{Ce}>\mathrm{Eu}>\mathrm{Ho}>\mathrm{N}$
$\mathrm{N}>\mathrm{Ce}>\mathrm{Eu}>\mathrm{Ho}$
$\mathrm{Eu}>\mathrm{Ce}>\mathrm{Ho}>\mathrm{N}$
$\mathrm{Ho}>\mathrm{N}>\mathrm{Eu}>\mathrm{Ce}$
Correct Option: , 3
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