Select the option that is related to the fifth word in the same way as the second word is related to the first word and the fourth word is related to the third word.

Snake : Reptile :: Frog : Amphibian :: Orchid : ?

Flower

THE LOGIC FOLLOWED HERE IS :

Snake : Reptile :: Frog : Amphibian :: Orchid : ?

Snake : Reptile

SNAKE ARE  LIMBLESS  REPTILES

AND

Frog : Amphibian

Frog   ARE  Amphibian

SIMILARLY

Orchid : ?

ORCHID ARE ONE OF THE LONGEST GENERA OF FLOWERING PLANTS