What is the first kind of PGR to be discovered among the gibberellins?

What is the first kind of PGR to be discovered among the gibberellins?
  1. GA1
  2. GA2
  3. GA3
  4. GA4

Solution

Gibberellic acid (GA3) was one of the first gibberellins to be discovered and remains the most intensively studied form.

Asked in: NCERT

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