Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : [6] Annulene. [8] Annulene and cis –[10] Annulene, are respectively aromatic, not-aromatic and aromatic.

                                        CIS [10] annulene

Reason R : Planarity is one of the requirements of aromatic systems.

In the light of the above statements, choose the most appropriate answer from the options given below.

Assertion A : Not correct , Reason R : correct

[6] – annulene

[8] – annulene

[10] – annulene

In [10] – Annulene – the hydrogen atoms in the 1 and 6 position interfere with each other and force the molecule out of planarity

If this annulene with five cis double bonds were planar, each internal angle would be 144°. Since a normal double bond has bond angle of 120°, this would be from ideal. This compound can be made but it does not adopt a planar conformation and therefore is not aromatic even though it has ten $\mathrm{\pi }$ electrons.