Hormone associated with drought tolerance is:

Correct option is C

· Abscisic acid (ABA) is the stress hormone.
· Functions during drought:
· Induces stomatal closure
· Enhances root growth
· Promotes drought tolerance genes
Why other options are wrong
· (a) Auxin regulates cell elongation.
· (b) Gibberellins promote growth, not stress response.
· (d) Cytokinin delays senescence, not drought tolerance.