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Question

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

A
Indole-3-acetic acid.
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B
Ethylene.
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C
Abscisic acid.
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D
Zeatin.
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Solution

The correct option is A Indole-3-acetic acid.
Indole-3-acetic acid (IAA) is the most common, naturally-occurring, plant hormone of the auxin class. It is the best known of the auxins, and has been the subject of extensive studies by plant physiologists. Chemically, IAA is a carboxylic acid in which the carboxyl group is attached through a methylene group to the C-3 position of an indole ring. In appearance, IAA is a colorless solid.

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