In each microsporangium , pollen grains formed , are released with the_____ of anther. These pollen grains of some plants, like_____ cause allergies and bronchial afflictions.
Choose the option with the pair of words which correctly fills the above blanks.

Options

A. dissociation , Hibiscus
B. dehydration , Viola
C. dehiscence, parthenium
D. dehiscence , Rose

Answer

To solve the question, we need to fill in the blanks with the correct terms related to the release of pollen grains from the anther and an example of a plant that causes allergies.

1. **Understanding the Process of Pollen Release**:
- In each microsporangium, pollen grains are formed. These pollen grains are released when the anther undergoes a specific process.
- The term that describes this process is "dehiscence." During dehiscence, the anther splits open, allowing the pollen grains to be released into the environment.

2. **Identifying a Plant that Causes Allergies**:
- The second part of the question asks for an example of a plant whose pollen can cause allergies and bronchial afflictions.
- A well-known example of such a plant is "Parthenium," also known as carrot grass. Its pollen is notorious for causing allergic reactions in many individuals.

3. **Combining the Answers**:
- Therefore, the complete sentence would read: "In each microsporangium, pollen grains formed are released with the **dehiscence** of the anther. These pollen grains of some plants, like **Parthenium**, cause allergies and bronchial afflictions."

### Final Answer:
- The correct words to fill in the blanks are "dehiscence" and "Parthenium."