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, we need to identify which plants allow pollen grains to be released from the microsporangium and come into direct contact with the opening of the ovules.

### Step-by-Step Solution:

1. **Understanding Pollen Grain Release**: Pollen grains are produced in the microsporangium of seed plants. When they are released, they need to reach the ovule for fertilization.

2. **Identifying Plant Groups**: The question lists several plant groups: Ficus, Pisum, Eucalyptus, Mangifera, Pinus, and Ginkgo. We need to determine which of these groups exhibit the characteristic of pollen grains contacting the ovule directly.

3. **Characteristics of Gymnosperms**: In gymnosperms, the ovules are not enclosed by an ovary wall, which means that when pollen is released, it can directly reach the ovule. This is a key feature of gymnosperms.

4. **Analyzing the Options**:
- **Ficus and Pisum**: These are angiosperms, where the ovules are enclosed within an ovary.
- **Eucalyptus and Mangifera**: Also angiosperms, similar to Ficus and Pisum.
- **Pinus and Ginkgo**: Both are gymnosperms, which means their ovules are exposed, allowing direct contact with pollen grains.

5. **Conclusion**: Since only Pinus and Ginkgo are gymnosperms, they are the correct answer to the question. Therefore, the pollen grain released from the microsporangium comes into direct contact with the opening of the ovules in Pinus and Ginkgo.

### 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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