For option f , polarise the double bond . by that I mean break the double in such a way that u get a negative charge on one ring and a positive charge on another . now using concepts of aromaticity check whether both rings are aromatic or not.
Select the case in which u get the most stable rings for ex both aromatic .
For option k see of the double bonds are in cyclic conjugation or not . if they are then its an aromatic compound.