Question
Which was discovered first?
More than $100$ gibberellins, reported from widely different organisms such as fungi and higher plants. They are denoted as $G A_{1}, G A_{2}, G A_{3}$ and so on. however, $G A_{3}$ was one the gibberellic acid to be discovered first and mostly intensively studied form
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| Column $I$ | Column $II$ |
| ($a$) $G _{1}$ phase | ($i$) Cell grows and organelle duplication |
| ($b$) $S$ phase | ($ii$) $DNA$ replication and chromosome duplication |
| ($c$) $G _{2}$ phase | ($iii$)Cytoplasmic growth |
| ($d$) Metaphase in $M$-phase | ($iv$) Alignment of chromosomes |
Here $A$ and $B$ refers to