Truthfulness is to Liar as Loyalty is to.........?

Choose the correct description for the given relation.

Sapphire : Ruby : Topaz

Choose the correct alternative for the given relation.

Knowledge : Ignorance

Choose the correct alternative for the given relation.

Jungle : Zoo : : Sea : ?

Snowfall is related to precipitation in the same way grotto is related to........

Ecology is related to Environment in the same way as Histology is related to........?