For tea plantations, hedge-making, which of the following plant growth hormones is used?

a) Zeatin

b) Indole-3 acetic acid

c) Abscisic acid

d) Ethylene

Answer: b) Indole-3 acetic acid

Explanation: Indole-3 acetic acid is an auxin used for hedge making in tea plantations. Auxin is a hormone that is synthesised in the apical buds and promotes apical dominance, and this leads to inhibition of the growth of lateral buds.

Indole 3 acetic acid, however, is used on tea plants as it promotes rooting and shooting.

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