An example of short day plant is

Options

A. potato
B. Radish
C. Chrysanthemum
D. Wheat

Answer

**Step-by-Step Solution:**

1. **Understanding Short Day Plants:**
Short day plants are those that flower when the day length is shorter than their critical day length. They require longer periods of darkness to initiate flowering.

2. **Identifying Examples of Short Day Plants:**
Common examples of short day plants include rice, tobacco, chrysanthemum, and cotton.

3. **Analyzing the Options Given:**
- **Potato:** This is a long day plant, so it is not an example of a short day plant.
- **Radish:** This is also a long day plant, thus not suitable as an example of a short day plant.
- **Chrysanthemum:** This is a short day plant and is a correct example.
- **Wheat:** This is another long day plant, making it an incorrect choice.

4. **Conclusion:**
The only correct example of a short day plant from the options provided is chrysanthemum.

**Final Answer:** Chrysanthemum

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