A) indole acetic acid
B) cytokinins
C) gibberellins
D) ethylene
Correct Answer: C
Solution :
Gibberellin promotes internodal elongation in a wide range of species. This intermodal elongation phenomenon is known as blotting. Gibberellin is a plant growth hormone which was first time obtained from a fungus Gibberellafujikuori (Fusarium moniliformi).
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