A) auxin
B) abscisic acid
C) gibberellin
D) cytokinins
Correct Answer: B
Solution :
Abscisic acid is called stress hormone because the production of this hormone is stimulated by drought, water logging and other adverse environmental conditions. It is also known as dormin as it induces dormancy in buds under ground stems and seeds. Cytokinins are basic plant growth hormones that promote cyto kinesis. The first cytokinin was kinetin. Gibberellins are weakly acidic growth hormones which cause cell elongation of intact plants in general and increased intermodal length of genetically dwarfed plants.
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