Analogy — Hair : Shampoo Choose the pair that maintains the object–appropriate cleansing agent relation.

Introduction / Context:
“Hair : Shampoo” maps an object to the product typically used to clean it. We must find a second pair with the same cleaning-target relation.

Given Data / Assumptions:

• Hair is cleaned with shampoo.
• We seek X : Y where Y is the normal cleansing agent for X.

Concept / Approach:
Eliminate pairs that are cosmetic but not cleansing, or that reverse object–agent roles.

Step-by-Step Solution:

Verification / Alternative check:
Standard hygiene routines pair teeth with toothpaste as hair with shampoo.

Why Other Options Are Wrong:

• Face : Powder — function mismatch.
• Button : Shirt — categorical mismatch.
• Detergent : Soap — both agents; missing the object.

Common Pitfalls:
Choosing cosmetic association over cleaning function.

Final Answer:
Teeth : Toothpaste