An example of phosphate solubilizing symbiotic association is:

Options

A. Azolla
B. Rhizobium
C. Pseudomonas
D. Mycorrhiza

Explanation

To answer the question "An example of phosphate solubilizing symbiotic association is:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Symbiotic Associations**:
- Symbiotic associations involve two different organisms living together, where both benefit from the relationship.

2. **Identifying the Type of Symbiotic Association**:
- In the context of phosphate solubilizing associations, we need to focus on those involving fungi and plants.

3. **Recognizing Mycorrhizae**:
- Mycorrhizae is a specific type of symbiotic association between fungi and the roots of higher plants.

4. **Function of Mycorrhizae**:
- In this association, the fungi help in solubilizing phosphorus from the soil and transferring it to the plant. This is crucial for plant growth as phosphorus is an essential nutrient.

5. **Mutual Benefit**:
- The fungi benefit from this relationship as well; they receive shelter and organic nutrients from the plant in return for the phosphorus they provide.

6. **Conclusion**:
- Therefore, the example of a phosphate solubilizing symbiotic association is **Mycorrhizae**.

### Final Answer:
An example of phosphate solubilizing symbiotic association is **Mycorrhizae**.

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