The set representing the correct order of ionic radius is :

Question

( A ) $Na^+ > Li^+ > Mg^{2+} > Be^{2+}$
( B ) $Li^+ > Be^{2+} > Na^+ > Mg^{2+}$
( C ) $Li^+ > Na^+ > Mg^{2+} > Be^{2+}$
( D ) $Mg^{2+} > Be^{2+} > Li^+ > Na^+$