Q. 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