(A) is non-aromatic as it is not planar (B) is antiaromatic as it contains conjugated system of 4nπ electrons or 2π electrons (C) is aromatic as it contains conjugated system of 4n+2π electrons (2π electrons). It is cyclic and planar (D) is non-aromatic as π electrons are not fully conjugated (E) is aromatic as it contains conjugated system of 4n+2π electrons (6π electrons). It is cyclic and planar (F) is anti aromatic as it contains conjugated system of 4nπ electrons (4π electrons). It is cyclic and planar (G) is aromatic as it contains conjugated system of 4n+2π electrons (6π electrons). It is cyclic and planar (H) is aromatic as it contains conjugated system of 4n+2π electrons (6π electrons). It is cyclic and planar. These are π electrons present in one ring. π electrons present in other ring are not counted (I) is aromatic as it contains conjugated system of 4n+2π electrons (14π electrons). It is cyclic and planar. The number of aromatic compound(s) is 5.