Which one of the following helps in absorption of phosphorus from soil by plants
or
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition

Options

A. Aspergillus
B. Glomus
C. Trichoderma
D. Azotobacter

Explanation

To solve the question regarding which microbe helps in the absorption of phosphorus from soil by plants or forms a symbiotic association with plants for their nutrition, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Symbiotic Associations**:
- Symbiotic associations are interactions between two different organisms where both benefit from the relationship. In the context of plants, certain microbes form symbiotic relationships that enhance nutrient absorption.

2. **Identifying the Role of Fungi**:
- Fungi are known to form symbiotic relationships with plant roots. This relationship is crucial for nutrient uptake, especially phosphorus, which is often limited in soil.

3. **Recognizing Mycorrhizae**:
- The specific type of symbiotic relationship formed between fungi and plant roots is known as mycorrhizae. This association significantly improves the plant's ability to absorb water and nutrients, particularly phosphorus.

4. **Evaluating the Given Options**:
- The options provided are:
- A) Aspergillus
- B) Golmas
- C) Trichoderma
- D) Acetobacter
- Among these, we need to identify which organism is a type of fungi that forms a mycorrhizal association.

5. **Identifying the Correct Answer**:
- "Golmas" (likely a misspelling of "Glomus") is a type of fungi that forms endomycorrhizal associations with plant roots. This type of fungi is well-known for enhancing phosphorus absorption in plants.
- Therefore, the correct answer is **B) Golmas**.

### Final Answer:
The microbe that helps in the absorption of phosphorus from soil by plants and forms a symbiotic association with them is **B) Golmas**.