Analogies — Specialist and domain of interest Prompt: Numismatist : Coins ⇒ ? Select the pair that mirrors “collector/specialist : collected items”.

Introduction / Context:
A numismatist studies or collects coins. The required analogy is another “-ist” whose defining activity is collecting a particular class of items, not merely making, selling, or studying them in a general scientific sense.

Given Data / Assumptions:

• Numismatist ↔ coins (collector/enthusiast).
• We seek a parallel collector-to-items relation.
• Roles involving manufacture or scientific study without the collecting emphasis are distractors.

Concept / Approach:
Identify among the options an “-ist” whose domain is collection as a hobby or specialization directly tied to the items, mirroring numismatics and coins.

Step-by-Step Solution:

Verification / Alternative check:
The -ist suffix can indicate many roles; here we need the specific “collecting” function. Philately fits that definition explicitly, just as numismatics does.

Why Other Options Are Wrong:

• Jeweller : Jewels — trade/craft rather than collection.
• Cartographer : Maps — creation/production rather than collection.
• Geneticist : Chromosomes — scientific study of heredity, not item collection.

Common Pitfalls:
Equating any professional connected with an item to a collector. The question targets hobbyist/specialist-collector semantics.

Final Answer:
Philatelist : Stamps