Which one has the same electron configuration as a neon atom ?

The correct option is B $N{a}^{+}$
Sodium-ion $N{a}^{+}$ has the same electron configuration as a neon atom.

Both are isoelectronic species with 10 electrons and the electronic configuration $1s^{2}2s^{2}2p^6$

Sodium has electronic configuration $1s^{2}2s^{2}2p^{6}3s^1$.

It loses one electron to give $N{a}^{+}$ ion with electronic configuration of $Ne.$

Hence, the correct option is A.