state gov OPSC Assistant Agriculture Officer Mock Test 2024 Agriculture and Rural Development Soil and Water Conservation Soil Erosion

নীচের কোন দূষকটি ভূমিক্ষয় ঘটায় ?

1
গোবর 
2
মাছের কাঁটা
3
প্লাস্টিক
4

পুরানো কাগজ

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