Analogy — Whole to part: Book : Chapter

Introduction / Context:
The first item is a whole, and the second is a constituent part. We need an option that mirrors this whole→part relation.

Given Data / Assumptions:

• Book contains chapters.
• House contains rooms.

Concept / Approach:
Pick a pair where the second item is a structural component of the first.

Step-by-Step Solution:

Why Other Options Are Wrong:

• Pen : Pencil: coordinate items, not whole–part.
• Computer : Calculator: different devices; not part–whole.
• Mobile : Landline: different phone types.
• None of these: incorrect because “House : Room” fits.

Common Pitfalls:
Confusing category siblings for part–whole relations.

Final Answer:
House : Room