Which of the following is the correct order of increasing size of the grains of soil particles?
1. Clay
2. Silt
3. Sand
4. Gravel
A. 2, 3, 4, 1
B. 1, 2, 3, 4
C. 4, 3, 2, 1
D. 1, 4, 3, 2
Answer: Option B
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