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One of the commonly used plant growth hormone in tea plantations is 

  • ethylene

  • abscisic acid

  • Zeatin

  • indole-3- acetic acid

Answer

D.

indole-3- acetic acid

Tea plants are grown by stem cuttings. If we dip the lower cut end of a cutting in a dilute solution of auxins (IAA, IBA etc) , large number large number of roots are developed on the cut ends, due to which these cutting develop into successful plants.

Tea plants are grown by stem cuttings. If we dip the lower cut end of a cutting in a dilute solution of auxins (IAA, IBA etc) , large number large number of roots are developed on the cut ends, due to which these cutting develop into successful plants.