Classification – World cities: choose the odd one out based on political status. Three are national capitals; one is not a national capital. Which option is different? Options: Beijing, Melbourne, Paris, Athens.

Introduction / Context:
Geography classification questions often use political or administrative status. While several cities may be globally famous, only some are designated national capitals. Identifying this status yields the odd one out.

Given Data / Assumptions:

• Beijing: Capital of China.
• Paris: Capital of France.
• Athens: Capital of Greece.
• Melbourne: Major Australian city; national capital is Canberra.

Concept / Approach:
Determine whether each city is a national capital. The single non-capital city is the exception.

Step-by-Step Solution:
Step 1: Tag each city as capital or not.Step 2: Beijing/Paris/Athens are capitals.Step 3: Melbourne is not a national capital; hence, it is the odd one out.

Verification / Alternative check:
Australia’s federal capital is Canberra; Melbourne, while historically significant, lacks current capital status.

Why Other Options Are Wrong:
Beijing/Paris/Athens: All are national capitals and thus belong to the main group.

Common Pitfalls:
Do not confuse “largest” or “famous” with “capital.” Capital status is a specific designation.

Final Answer:
Melbourne