Growth hormone that speeds up malting in brewery industry is

Options

A. Kinetin
B. Gibberellic acid
C. Auxin
D. Ethylene.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the growth hormone that speeds up the malting process in the brewery industry. Malting is a crucial step in brewing beer, where grains are germinated and then dried.

2. **Identifying the Options**: The options provided are:
- Kinetin
- Gibberellic acid
- Auxin
- Ethylene

3. **Analyzing Each Option**:
- **Kinetin**: This is a type of cytokinin that promotes cell division but is not specifically known for speeding up malting.
- **Gibberellic Acid**: This hormone is known for its role in stimulating stem elongation and germination. It is commonly used in the malting process to promote the growth of the seedling.
- **Auxin**: This hormone plays a role in various growth processes but is not specifically associated with malting.
- **Ethylene**: This is a gas that acts as a plant hormone, but it is not directly related to the malting process.

4. **Identifying the Correct Answer**: Among the options, **Gibberellic Acid** is known to be involved in the malting process as it promotes germination and growth in seeds, making it the correct answer.

5. **Final Answer**: The growth hormone that speeds up malting in the brewery industry is **Gibberellic Acid**.