Organic acids developed from organic matter decomposition act as chelating agent may be

Correct option is B

✅ (b) Amino acids [Chelation via Functional Groups] • Amino acids are low molecular weight organic acids produced during decomposition of organic matter. • They act as natural chelating agents by forming complexes with metal ions via amino (-NH₂) and carboxyl (-COOH) groups. • This enhances micronutrient availability (e.g., Fe, Zn, Mn) to plants. • Often utilized in foliar sprays or organic soil amendments.
❌ (a) Mercuric acids • Not naturally occurring from decomposition. • Mercury is toxic and does not act as a chelating agent in soils.
❌ (c) Abscisic acids • A plant hormone involved in stress responses, not chelation. • Does not arise from organic matter breakdown.
❌ (d) Gibberellic acids • Another plant hormone that promotes growth. • Not involved in chelation or metal complexation.