Gibberellic acid was discovered in connection with a disease in rice seedling , caused by a

Options

A. Virus
B. Bacterium
C. Fungus
D. Nematoda

Answer

**Step-by-Step Text Solution:**

1. **Identify the Context**: The question asks about the discovery of gibberellic acid in relation to a disease affecting rice seedlings.

2. **Recognize the Disease**: The disease mentioned is known as "foolish seedling disease." This is a critical point as it links the discovery of gibberellic acid to a specific plant disease.

3. **Determine the Causative Agent**: The transcript states that the disease is caused by a fungus.

4. **Name the Fungus**: The specific fungus responsible for the foolish seedling disease is identified as *Gibberella fujikuroi*.

5. **Conclusion**: Therefore, the organism that causes the disease in rice seedlings, which is associated with the discovery of gibberellic acid, is *Gibberella fujikuroi*.

**Final Answer**: The disease in rice seedlings, known as foolish seedling disease, is caused by the fungus *Gibberella fujikuroi*.

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