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Question

Foolish seedling disease of rice led to the discovery of

A
IAA
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B
GA
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C
ABA
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D
2, 4-D
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Solution

The correct option is D GA
Foolish seedling disease or Bakanae disease is a disease of rice seedlings, which was caused by a fungal pathogen; Gibberella fujikuroi. E. Kurosawa reported the appearance of symptoms of the disease in uninfected rice seedlings when they were treated with sterile filtrates of the fungus. The active substances were later identified as Gibberellic acid.
Thus, the correct answer is option B.

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