The basidiomycetes includes :-

Options

A. Rusts
B. Smuts
C. Mushrooms
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Basidiomycetes**:
- Basidiomycetes are a class of fungi characterized by the presence of basidiospores. These spores are produced on a structure called a basidium.

2. **Analyzing the Options**:
- **Option A: Rust**: Rust is a type of fungal disease that affects plants, specifically caused by fungi classified under the group called Urediniomycetes, which are not basidiomycetes.
- **Option B: Smuts**: Smuts are also fungal diseases that affect crops and cereal plants. They belong to the Basidiomycetes group, as they produce basidiospores.
- **Option C: Mushroom**: Mushrooms are a type of fungus that belongs to the Basidiomycetes group. They are known for their edible varieties and also produce basidiospores.

3. **Conclusion**:
- Since smuts and mushrooms are classified under Basidiomycetes, but rust is not, the correct answer to the question "The basidiomycetes includes:" is **Option D: All of the above**.

### Final Answer:
The basidiomycetes include: **Option D: All of the above**.

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