Compounds which disrupt hormone balance and protein synthesis by which the plant ultimately dies are

Correct option is B

✅ (b) Amino acid synthesis regulators [Herbicidal Action] • These compounds inhibit enzymes involved in amino acid biosynthesis (e.g., ALS, EPSPS). • They disrupt protein synthesis and hormonal regulation, leading to plant death. • Examples: Glyphosate, Imazethapyr. • Widely used as systemic herbicides in agriculture.
❌ (a) Seedling growth inhibitors • Affect initial growth stages but do not directly interfere with protein/hormone synthesis. • Often pre-emergence herbicides.
❌ (c) Plant growth regulators • Natural or synthetic substances used to modify plant growth, not kill. • Includes auxins, cytokinins, etc.
❌ (d) Pigment inhibitors • Disrupt chlorophyll synthesis leading to bleaching. • Not primarily responsible for hormone or protein synthesis disruption.