Genetically dwarf plant can be converted into a plant of normal height with help of:
(a) Auxin
(b) Gibberellin
(c) Cytokinins
(d) Auxin

Options

A. Auxin
B. Gibberellin
C. Cytokinins
D. Auxin

Answer

To solve the question regarding which hormone can convert a genetically dwarf plant into a plant of normal height, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which plant hormone can help a genetically dwarf plant reach a normal height.

2. **Identify the Hormones**: The options provided are:
- (a) Auxin
- (b) Gibberellin
- (c) Cytokinins
- (d) Auxin (repeated)

3. **Research Plant Hormones**:
- **Auxin**: Primarily involved in cell elongation and growth regulation but not specifically known for increasing height in dwarf plants.
- **Gibberellin**: Known for promoting stem elongation and growth. It plays a crucial role in breaking seed dormancy and promoting germination.
- **Cytokinins**: Mainly involved in cell division and growth, particularly in roots and shoots, but not specifically for height increase in dwarf plants.

4. **Focus on Gibberellin**: Gibberellin is recognized for its role in promoting stem elongation. It induces both cell division and cell elongation, which are essential for the growth of a plant to reach its normal height.

5. **Conclusion**: Since gibberellin is the hormone that specifically promotes stem elongation and can convert a dwarf plant into a plant of normal height, the correct answer is (b) Gibberellin.

### Final Answer:
(b) Gibberellin