Provide the correct condensed structural formula (if straight chain) or line-angle formula (if cyclic) of the compound 3-ethylbenzaldehyde.

Condensed structural formula of 3-ethylbenzaldehyde, showing ethyl group on a benzene ring.

Line-angle formula of 3-ethylbenzaldehyde, depicting cyclic structure with ethyl substituent.

Condensed structural formula of 3-ethylbenzaldehyde, highlighting the aldehyde functional group.

Line-angle formula of 3-ethylbenzaldehyde, illustrating the cyclic arrangement of atoms.