Which of the following species is aromatic?

For a compound to be aromatic, it should obey $\left(4\mathrm{n}+2\right){\mathrm{\pi e}}^{-}$rule, where it must contain 2, 6, 10, 14,.....$\mathrm{\pi }$e^-s, an sp²carbon and a complete delocalization of electrons with planarity.

Option 2 has sp³ carbon. Hence, it not aromatic.

Option 1 has 5 $\mathrm{\pi }$ electrons. hence, it is not aromatic.

Option 3 has 8 $\mathrm{\pi }$ electrons. hence, it is not aromatic.

Option 4 has 6 $\mathrm{\pi }$ electrons, which participate in resonance and is planar. So, it is aromatic.