Which of the following is the correct about the humus ?

Options

A. Black colored organic and inorganic material
B. Dark brown colored crystalline organic and inorganic material
C. Black colored crystalline organic and inorganic material
D. Dark brown colored amorphous organic material

Answer

To determine the correct statement about humus, we will analyze the options provided and the characteristics of humus itself.

### Step-by-Step Solution:

1. **Understanding Humus**:
- Humus is a significant component of soil, primarily composed of decomposed organic matter from plants and animals.
- It plays a crucial role in soil fertility and structure.

2. **Characteristics of Humus**:
- **Color**: Humus is typically described as dark brown in color.
- **Form**: It is not crystalline; rather, it is amorphous, meaning it does not have a defined shape or structure.
- **Composition**: Humus is organic material, rich in substances like lignin and cellulose.

3. **Analyzing the Options**:
- **Option 1**: Black coloured organic and inorganic material - Incorrect. Humus is dark brown and is purely organic.
- **Option 2**: Dark brown coloured crystalline organic and inorganic material - Incorrect. Humus is dark brown and amorphous, not crystalline.
- **Option 3**: Black coloured crystalline organic and inorganic material - Incorrect. Again, humus is dark brown and amorphous, not crystalline.
- **Option 4**: Dark brown coloured amorphous organic material - Correct. This accurately describes humus.

4. **Conclusion**:
- The correct statement about humus is that it is a "dark brown coloured amorphous organic material".

### Final Answer:
**The correct option is: Dark brown coloured amorphous organic material.**

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