Select the option that is related to the third term in the same way as the second term is related to the first term.

Dogs : Lungs :: Fish : ?

​Dogs : Lungs :: Fish : ?

Logic: Breathing Organ.

Dogs : Lungs: Dogs breathe using their lungs.

Fish : ?: Fish breathe using gills (instead of lungs).

So, the relationship is that dogs use lungs to breathe, and similarly, fish use gills to breathe.

Thus, the correct option is: (d) Gills​