Bolting means

Options

A. Elongation of stem in rosette plants
B. Dwarfing of stem
C. Increase in flowers.
D. Appearance of flowers.

Answer

**Step-by-Step Solution:**

1. **Understanding Bolting**: Bolting refers to a specific growth phenomenon in certain plants, particularly rosette plants, where there is a rapid elongation of the stem.

2. **Role of Gibberellins**: The process of bolting is primarily influenced by plant hormones known as gibberellins (or gibberellic acid). These hormones promote longitudinal growth, which is essential for the bolting process.

3. **Conditions for Bolting**: Bolting typically requires specific environmental conditions, such as long daylight hours or a period of cold treatment. These conditions trigger the hormonal changes necessary for the elongation of the stem.

4. **Artificial Induction**: In addition to natural conditions, bolting can also be induced artificially by applying gibberellic acid to the plants. This allows for controlled growth even in non-ideal conditions.

5. **Correct Definition**: Given the options provided, the correct definition of bolting is "elongation of stem in rosette plants." This distinguishes it from other processes like dwarfing of the stem, increase in flowers, or mere appearance of flowers.

**Final Answer**: Bolting means elongation of stem in rosette plants.

---