Select the odd one with respect to long-day plants.

Options

A. Poppy
B. Sunflower
C. Wheat
D. Radish

Answer

To solve the question of which plant is the odd one out with respect to long-day plants, we can follow these steps:

### Step 1: Understand the Concept of Long-Day Plants
Long-day plants are those that require a longer duration of light (day length) to flower. They typically bloom when the day length exceeds a certain critical duration.

### Step 2: Identify the Types of Plants
There are three categories of plants based on their light requirements:
- **Long-Day Plants**: Require more light than a critical duration for flowering.
- **Short-Day Plants**: Require less light than a critical duration for flowering.
- **Day-Neutral Plants**: Flowering is not dependent on the duration of light.

### Step 3: Analyze the Given Options
Now, let's analyze the options provided:
A. Poppy
B. Sunflower
C. Wheat
D. Radish

### Step 4: Classify Each Plant
- **Poppy**: A long-day plant.
- **Sunflower**: A day-neutral plant.
- **Wheat**: A long-day plant.
- **Radish**: A long-day plant.

### Step 5: Identify the Odd One Out
From the classifications:
- Poppy, Wheat, and Radish are all long-day plants.
- Sunflower is a day-neutral plant.

Thus, the odd one out with respect to long-day plants is **B. Sunflower**.

### Final Answer
**B. Sunflower**

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