Hormone responsible for ageing in plants is

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IAA

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ABA

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Cytokinin

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Solution

The correct option is C ABA
A- GA or Gibberellic acid helps in promoting the growth and the elongation of cells.
B- IAA or Indole acetic acid induces cell elongation and cell division with all subsequent results for plant growth and development.
C- ABA or Abscisic acid is responsible for ageing in plants as well as important for plants in the response to drought, soil salinity etc.
D- Cytokinin, a plant hormone involved in cell growth and differentiation, but also affect apical dominance, axillary bud growth.
So, the correct option is 'ABA'.

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