One harmone is used to speed up the malting process in barley, another is used to promote flowering in pineapple, while the third helps in the delay of leaf senescence. These are respectively

Options

A. Auxin, Gibberellin and Cytokinin
B. Gibberellin, Cytokinin, Auxin
C. Gibberellin, Auxin, Cyctokinin
D. Cytokinin, Auxin, Gibberellin

Answer

To answer the question regarding the hormones used in various plant processes, we will identify each hormone based on its function as described in the question.

### Step-by-Step Solution:

1. **Identify the hormone used to speed up the malting process in barley:**
- The malting process in barley is accelerated by **Gibberellin**. This hormone plays a crucial role in regulating growth and development in plants, particularly in the brewing industry where it is used to enhance the malting process.

2. **Identify the hormone used to promote flowering in pineapple:**
- The hormone responsible for promoting flowering in pineapple is **Auxin**. Auxins are known to induce the synthesis of ethylene, which is a key factor in the flowering process of many plants, including pineapple.

3. **Identify the hormone that helps delay leaf senescence:**
- The hormone that helps in delaying leaf senescence is **Cytokinin**. Cytokinins are known for their role in promoting cell division and delaying the aging process of leaves, thus prolonging their life.

4. **Compile the hormones in the order specified in the question:**
- Based on the functions identified, the correct order of hormones is:
1. Gibberellin (for malting in barley)
2. Auxin (for flowering in pineapple)
3. Cytokinin (for delaying leaf senescence)

### Final Answer:
The hormones are respectively **Gibberellin, Auxin, and Cytokinin**.

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