Find the odd one out from the given alternatives:

Question

Find the odd one out from the given alternatives:

1. A. Alluvial Soil
2. B. Black Soil
3. C. Red Soil
4. D. Igneous Rock (Correct answer)

Correct Answer

Option D — Igneous Rock

Detailed Solution & Explanation

The correct answer is Igneous Rock.

Key Points

• Alluvial soil, black soil and red soil are all soil types found in India (river-deposited, volcanic-derived regur, and iron-rich soil respectively).
• Igneous rock is a category of rock — solidified magma — not a soil at all.
• Soils may form from weathered igneous rock, but that makes it a parent material, not a member of the soil group.
• Classification questions hinge on the exact category level: three members share a class, the fourth belongs one level up or sideways.