Which of the following does ensure autogamy in viola?
(a) Cleistogamy
(b) Homogamy
(c) Bud pollination
(d) Dichogamy

Options

A. Cleistogamy
B. Homogamy
C. Bud pollination
D. Dichogamy

Answer

To solve the question regarding which option ensures autogamy in Viola, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Autogamy**: This refers to self-pollination, where a flower fertilizes itself without the need for pollen from another flower.
- **Cleistogamy**: This is a type of flowering where the flowers do not open and are self-pollinating.
- **Homogamy**: This refers to flowers that are capable of self-pollination but may also allow cross-pollination.
- **Bud Pollination**: This is a process where pollen is transferred from an immature flower bud.
- **Dichogamy**: This refers to a condition where the male and female parts of a flower mature at different times, which can prevent self-pollination.

2. **Analyze the Options**:
- **Option (a) Cleistogamy**: Since cleistogamous flowers do not open, they ensure self-pollination without the risk of cross-pollination, making this a strong candidate for ensuring autogamy.
- **Option (b) Homogamy**: While it allows self-pollination, it does not ensure it as effectively as cleistogamy.
- **Option (c) Bud Pollination**: This does not directly relate to self-pollination in the same way as cleistogamy.
- **Option (d) Dichogamy**: This actually prevents self-pollination by having male and female parts mature at different times.

3. **Conclusion**:
- Based on the definitions and analysis, the option that best ensures autogamy in Viola is **(a) Cleistogamy**.

### Final Answer:
(a) Cleistogamy

---