Choose the correct option regarding the discovery of $Gibberellic$ $Acid$.

  • A
    '$Bakanae$' is a disease of rice seedlings.
  • B
    '$Bakanae$' disease is caused by the fungus $Gibberella$ $fujikuroi$.
  • C
    Cell-free filtrate of the fungus induces symptoms of the disease in healthy rice seedlings.
  • D
    All of the above.

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