Which of the following is used to hasten maturity period of juvenile conifers ?

Options

A. Auxin
B. GA
C. Cytokinin
D. Ethylene

Answer

To solve the question "Which of the following is used to hasten maturity period of juvenile conifers?", we can follow these steps:

### Step 1: Identify the options provided
The options given are:
- Auxin
- GA (Gibberellic Acid)
- Cytokinin
- Ethylene

### Step 2: Understand the role of each hormone
- **Auxin**: This hormone is primarily involved in processes like cell elongation, root formation, and xylem differentiation. It does not significantly influence the maturity period of juvenile conifers.

- **Gibberellic Acid (GA)**: This is a type of gibberellin, a plant hormone that promotes stem elongation, seed germination, flowering, and hastens the maturity period in juvenile conifers.

- **Cytokinin**: This hormone is mainly involved in cell division and growth. It does not specifically hasten maturity in conifers.

- **Ethylene**: This hormone is known for its role in fruit ripening and does not affect the maturity of juvenile conifers.

### Step 3: Determine the correct answer
Based on the roles of these hormones, gibberellic acid (GA) is the one that is known to hasten the maturity period of juvenile conifers.

### Conclusion
Thus, the correct answer to the question is **Gibberellic Acid (GA)**.

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