Choose the correct alternative for the given relation.
Laboratory : Germs
School : Students
Playground : Games
Library : Books
Observatory : Planets
Choose the correct alternative for the given relation.
Disease : Pathology : : Planet : ?
Choose the correct alternative for the word belongs to the same group.
Gorges : Canyons : Meanders
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Sneer : Contempt
Choose the correct alternative for the given relation.
$42 : 20 : \,: 64 : ?$
Choose the correct alternative for the given relation.
Threat : Insecurity