The pollen grain is released from the microsporangium and directly come in contact with the opening of ovules in `:`

Options

A. Ficus and Pisum
B. Eucalyptus and Mangifera
C. Pinus and Ginkgo
D. More then one option is correct

Answer

To solve the question regarding the release of pollen grains from the microsporangium and their direct contact with the opening of ovules, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Pollen Grain**: This is the male gametophyte in seed plants that carries the male gametes.
- **Microsporangium**: This is the structure in which pollen grains are produced in seed plants.
- **Ovule**: This is the structure that develops into a seed after fertilization and contains the female gametes.

2. **Identifying the Plant Group**:
- The question refers to a specific group of plants where pollen grains are released and come into direct contact with the ovules. This is a characteristic feature of **gymnosperms**.

3. **Characteristics of Gymnosperms**:
- Gymnosperms are known as "naked seed" plants because their seeds are not enclosed in an ovary wall.
- In gymnosperms, the male gametes (pollen grains) are produced in microsporangia and are directly transferred to the ovules without any intermediary structures.

4. **Analyzing the Options**:
- We need to identify which of the given options includes gymnosperms.
- The options are:
- Ficus and Pisum (both are angiosperms)
- Eucalyptus and Mangifera (both are angiosperms)
- Pinus and Ginkgo (both are gymnosperms)
- Ectancer (not a recognized plant group)

5. **Conclusion**:
- The correct answer is **Pinus and Ginkgo**, as both are examples of gymnosperms where pollen grains are released from microsporangia and come into direct contact with the ovules.

### Final Answer:
The pollen grain is released from the microsporangium and directly comes in contact with the opening of ovules in **Pinus and Ginkgo**.

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