During self pollination of Mirabilis
(a) Flowers are closed
(b) Flowers are open and growing style brings the stigma in contact with anthers
(c) brings anthers in contact with stigma
(d) Style bends to brings stigma in contact with anthers

Options

A. Flowers are closed
B. Flowers are open and growing style brings the stigma in contactt with anthers
C. Filaments brings anthers in contact with stigma
D. Style bends to brings stigma in contact with anthers.

Answer

To solve the question regarding self-pollination in Mirabilis, we need to analyze the provided options based on the characteristics of the flower and the process of self-pollination.

### Step-by-Step Solution:

1. **Understanding Mirabilis**:
- Mirabilis, specifically Mirabilis jalapa, has bisexual flowers, meaning they contain both male (anthers) and female (stigma) reproductive structures.

2. **Homogamous Flowers**:
- These flowers are described as homogamous, which means that the male and female parts mature simultaneously. This is crucial for self-pollination to occur.

3. **Self-Pollination Mechanism**:
- During self-pollination, the anthers and stigma are positioned in such a way that they can easily come into contact with each other.

4. **Analyzing the Options**:
- **Option (a)**: "Flowers are closed" - This is not correct because self-pollination can occur in open flowers.
- **Option (b)**: "Flowers are open and growing style brings the stigma in contact with anthers" - This is partially correct but does not fully describe the mechanism.
- **Option (c)**: "Brings anthers in contact with stigma" - This is correct as the anthers do come into contact with the stigma during self-pollination.
- **Option (d)**: "Style bends to bring stigma in contact with anthers" - This is also a valid description of the process.

5. **Conclusion**:
- The most accurate description of the self-pollination process in Mirabilis is that the filaments of the anthers recoil and bring the anthers into contact with the stigma. Therefore, **Option (c)** is the best answer.

### Final Answer:
(c) brings anthers in contact with stigma.