Q. Consider the following statements about alluvial soil
1. Their fertility is due to mixing the debris.
2. They contain a great variety of salts which enhances their fertility
3. The soils are fine grained and porous
4. They are rich in nitrogen and humus
Which of the statements

• (A) 1 and 2 are correct
• (B) 1 and 4 are correct
• (C) 2, 3 and 4 are correct
• (D) 1, 2 and 3 are correct