Classification — deserts and continents: choose the pair that does NOT correctly match a desert with its real location.

Introduction / Context:
Geography classification often tests real-world pairings. Here, three desert–region pairs are correct and one is incorrect. Spotting the factual mismatch is the goal.

Given Data / Assumptions:

• Sahara lies in Africa (largest hot desert).
• Thar lies primarily in India (northwestern India and adjoining Pakistan).
• Kalahari is in southern Africa, not in America.
• Gobi spans Mongolia and northern China.

Concept / Approach:
Validate each pair against standard locations. The single incorrect mapping is the odd one out.

Step-by-Step Solution:
1) Sahara : Africa → correct.2) Thar : India → correct (Indian subcontinent).3) Kalahari : America → incorrect; Kalahari belongs to Africa.4) Gobi : Mongolia → correct (Mongolia/China).5) Therefore the unique mismatch is Kalahari : America.

Verification / Alternative check:
Recall continental groupings: Kalahari (Botswana/Namibia/South Africa) is definitively African.

Why Other Options Are Wrong:
They are accurate desert–region associations and thus not the odd pair.

Common Pitfalls:
Confusing Kalahari (Africa) with Atacama (South America) or Mojave (North America).

Final Answer:
Kalahari : America