Rahul sprayed chemical ‘X’ on plant 1 and chemical ‘Y’ on plant 2. After a few days he observed a sudden growth of stem in plant 1, while leaves in plant 2 started wilting. Identify the chemicals X and Y.

X - Auxin; Y - Cytokinin

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X - Gibberellins; Y - Abscisic Acid

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X - Cytokinin; Y - Auxin

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X - Gibberellins; Y - Auxin

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Solution

The correct option is B X - Gibberellins; Y - Abscisic Acid
$∙$ Chemical 'X' led to an increase in growth of stem. Both auxin and gibberellins promote stem growth.
$∙$ Chemical 'Y' resulted in wilting of leaves. Abscisic acid is a plant growth inhibitor. Its effects include wilting of leaves.
$∙$ Cytokinins promote cell division.
$∙$ So, we can say that X is gibberellin and Y is abscisic acid. Hence, option c is correct.

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