Authentic Classroom Explanation by IAS Monk

📍 The Question

Consider the following information:

In how many of the above rows is the information correctly matched?

(a) Only one
(b) Only two
(c) Only three
(d) All four

Correct Answer: (b) Only two

🎯 Theme of the Question

World Geography | Geomorphology | Mountain Types | Fold vs Block Mountains

This is a classification-based physical geography question, testing clarity on origin and type of major mountain systems.

🧠 Classroom Explanation

Let us verify each row carefully.

🔹 Row 1: Central Asia – Vosges – Fold mountain ❌

• Vosges Mountains are located in Europe (France), not Central Asia
• They are classic Block Mountains, formed due to faulting
• They lie opposite the Black Forest across the Rhine Rift Valley

❌ Region incorrect
❌ Type incorrect

✘ Row 1 is incorrectly matched

🔹 Row 2: Europe – Alps – Block mountain ❌

• Alps are located in Europe ✔️
• However:
  • Alps are young fold mountains
  • Formed due to collision of African and Eurasian plates
• They are not block mountains

✔️ Region correct
❌ Type incorrect

✘ Row 2 is incorrectly matched

🔹 Row 3: North America – Appalachians – Fold mountain ✅

• Appalachians are located in North America
• They are old fold mountains
• Formed during ancient orogenic movements

✔️ Region correct
✔️ Type correct

✅ Row 3 is correctly matched

🔹 Row 4: South America – Andes – Fold mountain ✅

• Andes are located along the western margin of South America
• They are young fold mountains
• Formed due to subduction of the Nazca Plate beneath the South American Plate

✔️ Region correct
✔️ Type correct

✅ Row 4 is correctly matched

📊 Final Assessment

👉 Only two rows are correctly matched

❌ UPSC Elimination Logic

• UPSC exploits:
  • Block vs Fold mountain confusion
  • European mountain misplacement
• Vosges & Alps are often used as trap pairs

🧩 Memory Hook

“Vosges break, Alps fold; Appalachians old, Andes bold.”

🧠 Prelims Strategy Insight

For mountain-type questions:

• Block mountains → Vosges, Black Forest
• Old fold mountains → Appalachians, Urals
• Young fold mountains → Alps, Andes, Himalayas

🧭 IAS Monk Whisper

Mountains remember how they were born — classifications reveal their story.