Which of the following hormones is used as a herbicide?

Correct option is C

✅ (c) 2, 4-D: • Full name: 2,4-Dichlorophenoxyacetic acid, a synthetic auxin. • Commonly used as a selective post-emergence herbicide. • Controls broadleaf weeds without harming grasses like wheat or rice. • Mimics plant hormones and causes uncontrolled growth in target weeds.
❌ (a) Auxin: • Natural plant hormone involved in cell elongation. • Not directly used as a herbicide.
❌ (b) Cytokinin: • Promotes cell division and growth. • Not involved in weed control.
❌ (d) Abscisic acid: • Stress hormone in plants. • Plays no role in herbicidal activity.