Pick up the correct explanation

Options

A. Xanthium - Long day plant
B. Sunflower - short day plant
C. Wheat - short day plant
D. Tomato - Day neutral plant.

Answer

**Step-by-Step Solution:**

1. **Understanding Long Day Plants (LDP):**
- Long day plants are those that require a longer duration of light and shorter duration of darkness to flower.
- They typically bloom in the summer months when the days are longer.
- Examples include wheat, potato, radish, and spinach.

**Hint:** Remember that LDPs thrive in conditions of extended daylight.

2. **Understanding Short Day Plants (SDP):**
- Short day plants require a longer duration of darkness and shorter periods of light for flowering.
- They usually flower in the fall or winter when the days are shorter.
- Examples include rice, tobacco, and cotton.

**Hint:** SDPs are sensitive to the length of darkness rather than light.

3. **Identifying Day Neutral Plants:**
- Day neutral plants do not depend on the length of day or night for flowering.
- They can flower regardless of the light conditions.
- An example of a day neutral plant is tomato.

**Hint:** Day neutral plants can bloom at any time, regardless of light conditions.

4. **Evaluating the Options:**
- The first option incorrectly identifies xanthium as a long day plant; it is actually a short day plant.
- The second option incorrectly identifies sunflower as a short day plant; it is also a day neutral plant.
- The third option incorrectly identifies wheat as a short day plant; it is a long day plant.
- The fourth option correctly identifies tomato as a day neutral plant.

5. **Conclusion:**
- After analyzing all the options, the correct explanation is that tomato is a day neutral plant.

**Final Answer:** The correct explanation is option 4: Tomato is a day neutral plant.

---