\(\rightarrow 10\, \pi\, {e}^{-}\)in cyclic conjugation

\(\rightarrow \text { Aromatic }\)

\((2)\) \(\rightarrow 4 \pi {e}^{-}\)in ring conjugation \(\Rightarrow\) Anti Aromatic

\((3) \Rightarrow 4 \pi {e}^{-}\)in ring conjugation \(\Rightarrow\) Anti Aromatic

\((4)\)  \(\Rightarrow 6 \pi {e}^{-}\)in ring conjugation \(\Rightarrow\) Aromatic

- Cyclopentadienyl anion