Consider the following statements and select the correct option stating which one is true(T) and which one is false (F)
i) Vemalisation can help in shortening the juvenile or vegetative period of plant and bring early flowering
ii) Phytochrome is a pigment protein complex which exists in two inter-convertible forms -`P_r` and `P
iii) Sugar beet flowers after getting the inductive cycle of long dark periods and short photoperiods
iv) 2,4-D acts as weedicide to remove broad leaved weeds.
V) Auxins promote growth of lateral buds whereas cytokinins inhibit it

Options

A. I-T,II-T,III-F,IV-F,V-T
B. I-T,II-T,III-T,IV-T,V-F
C. I-F,II-F,III-T,IV-F,V-T
D. I-T,II-T,III-F,IV-T,V-F

Answer

To determine which statements are true (T) and which are false (F), let's analyze each statement one by one:

1. **Statement i**: "Vernalization can help in shortening the juvenile or vegetative period of plant and bring early flowering."
- **Analysis**: This statement is true. Vernalization is a process that involves exposing plants to a period of cold temperatures, which can lead to a reduction in the juvenile phase and promote earlier flowering.
- **Conclusion**: True (T)

2. **Statement ii**: "Phytochrome is a pigment-protein complex which exists in two inter-convertible forms - `P_r` and `P_fr`."
- **Analysis**: This statement is also true. Phytochrome is indeed a photoreceptor in plants that exists in two forms: Pr (inactive form) and Pfr (active form). These two forms can interconvert depending on light conditions.
- **Conclusion**: True (T)

3. **Statement iii**: "Sugar beet flowers after getting the inductive cycle of long dark periods and short photoperiods."
- **Analysis**: This statement is false. Sugar beet is classified as a long-day plant, meaning it requires longer daylight periods to induce flowering, not long dark periods.
- **Conclusion**: False (F)

4. **Statement iv**: "2,4-D acts as a weedicide to remove broad-leaved weeds."
- **Analysis**: This statement is true. 2,4-D (2,4-dichlorophenoxyacetic acid) is a commonly used herbicide that is effective against broad-leaved weeds.
- **Conclusion**: True (T)

5. **Statement v**: "Auxins promote growth of lateral buds whereas cytokinins inhibit it."
- **Analysis**: This statement is false. Auxins generally inhibit the growth of lateral buds (apical dominance), while cytokinins promote the growth of lateral buds.
- **Conclusion**: False (F)

### Summary of Statements:
- i) T
- ii) T
- iii) F
- iv) T
- v) F

### Final Answer:
The correct option based on the analysis is:
- i) T
- ii) T
- iii) F
- iv) T
- v) F