Eccrinology : Secretions : : Selenography : ?
Mantle
The relationship in the first pair involves the science (Ecology) dealing with secretions, and Selenography deals with the moon, which is the natural counterpart. The relationship should focus on the concept of study or science of a specific phenomenon. The correct analogy is that Selenography refers to the study of the Moon, similar to Ecocrinology for secretions. Thus, the correct answer is (B) Moon.