MCQ
$..........$ were often treated as untouchables.
- ✓Shudras
- BBrahmans
- CTeachers
- DTraders
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| List I | List II |
| A. Parent rock | 1. Method of soil conservation |
| B. Mulching | 2. Method of land resources conservation |
| C. Afforestation | 3. One of the main factors of soil formation |
| D. Flora-Fauna | 4. Affect the rate of humus formation |