Determine if (i) 1,5-dichlorocyclooctane and (ii) 2,4-dichloropentane have any achiral stereoisomers.

Both molecules have achiral stereoisomers.

Neither of the molecules has an achiral stereoisomer.

Only 2,4-dichloropentane has an achiral stereoisomer.

Only 1,5-dichlorocyclooctane has an achiral stereoisomer.