Which one of the following plant is LDP?

Options

A. Xanthium
B. Soyabean
C. Wheat
D. Tobacco

Answer

To determine which plant is a Long Day Plant (LDP), we can follow these steps:

### Step-by-Step Solution:

1. **Understand Long Day Plants (LDP)**:
- Long Day Plants are those that begin flowering when the duration of daylight exceeds a certain critical length. They require more light to trigger the flowering process.

2. **Analyze the Options**:
- We have four options to evaluate: Xanthium, Soybean, Wheat, and Tobacco.

3. **Evaluate Each Option**:
- **Option 1: Xanthium**:
- Xanthium is classified as a Short Day Plant (SDP), which means it flowers when the day length is shorter than the critical length. Therefore, this option is incorrect.
- **Option 2: Soybean**:
- Soybean is also a Short Day Plant. It requires less light to flower, making this option incorrect as well.
- **Option 3: Wheat**:
- Wheat is a Long Day Plant. It requires longer daylight hours to induce flowering, making this option correct.
- **Option 4: Tobacco**:
- Tobacco is another Short Day Plant, needing less light for flowering. Thus, this option is incorrect.

4. **Conclusion**:
- Based on the evaluations, the only plant that qualifies as a Long Day Plant is **Wheat** (Option 3).

### Final Answer:
The plant that is a Long Day Plant (LDP) is **Wheat**.

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