The following question, consist of two words each that have a certain relationship to each other, followed by four lettered pairs of words. Select the lettered pair that has the same relationship as the original pair of words: Cardiology : Heart :: Zoology : ?

The correct answer is: B. Animals

Cardiology is the study of the heart, while zoology is the study of animals. Both cardiology and zoology are branches of science that focus on a specific type of organism.

Insect is not the correct answer because insects are a type of animal, not the study of animals. Plants is not the correct answer because plants are a type of organism, not the study of organisms. Germs is not the correct answer because germs are a type of microorganism, not the study of microorganisms.