[A]: Elongation and division of cells are pro- moted by gibberellins.
[R]: Gibberellins increase the formation of hydrolytic enzymes that release energy nec- essary for growth

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

**Step-by-Step Solution:**

1. **Understanding Gibberellins:**
- Gibberellins are a class of plant hormones that play a crucial role in promoting growth. They are known to facilitate both cell elongation and division, which are essential processes for plant development.

2. **Role of Gibberellins in Cell Growth:**
- Gibberellins promote the elongation of cells, which leads to an increase in the length of plant structures such as stems and leaves. They also stimulate cell division, contributing to overall plant growth.

3. **Formation of Hydrolytic Enzymes:**
- Gibberellins increase the production of hydrolytic enzymes. These enzymes are vital for breaking down complex carbohydrates into simpler sugars, which are then used as energy sources for growth.

4. **Energy Release for Growth:**
- The hydrolytic enzymes released due to gibberellins facilitate the hydrolysis of stored carbohydrates in seeds, particularly in cereal grains. This process releases energy that is necessary for the growth and development of the plant.

5. **Connection Between Assertion and Reason:**
- The assertion states that gibberellins promote cell elongation and division, while the reason explains that they increase the formation of hydrolytic enzymes that release energy for growth. Both statements are true and are directly related; the action of gibberellins in promoting growth is linked to their role in enhancing the activity of hydrolytic enzymes.

6. **Conclusion:**
- Therefore, both the assertion and the reason are correct, and the reason provided is a valid explanation for the assertion. Gibberellins are essential for plant growth due to their roles in cell elongation, division, and energy release through hydrolytic enzymes.

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