Classification — item : category vs unrelated pair: Find the pair that is NOT “item is-a category”: Shirt : Dress, Boy : Girl, Mango : Fruit, Table : Furniture.

Introduction / Context:
Three pairs show a hyponym→hypernym (item→category) relation. One pair lists coordinate terms at the same level (two categories/person-types), not an is-a relation.

Given Data / Assumptions:

• Shirt is a type of dress/clothing.
• Mango is a fruit.
• Table is a piece of furniture.
• Boy and Girl are parallel human categories (sex/gender classes), neither is a category of the other.

Concept / Approach:
Test “X is a kind of Y.” If false or inapplicable (because both are kinds of Z), the pair is the outlier.

Step-by-Step Solution:
1) Shirt→Dress = true (garment type).2) Mango→Fruit = true.3) Table→Furniture = true.4) Boy→Girl = false; both are coordinate under “child/person.”

Verification / Alternative check:
Try reversing: “Girl is a type of Boy” is false, confirming non-hierarchical relation.

Why Other Options Are Wrong:
They are valid is-a relations.

Common Pitfalls:
Letting social/semantic nuances distract; strictly follow category logic.

Final Answer:
Boy : Girl