What is a fertiliser that supplies two or more than two primary nutrients called?

Correct option is D

✅ (d) Complex fertiliser: • Contains two or more primary plant nutrients (N, P, K). • Examples: NPK (10:26:26), DAP (18:46:0). • Nutrients are in chemical combination form.
❌ (a) Straight fertiliser: • Contains only one primary nutrient (e.g., Urea – N only).
❌ (b) Organic manure: • Made from animal or plant waste; nutrient content is variable and generally low.
❌ (c) Green manure: • Consists of undecomposed plant material, ploughed into soil for organic enrichment.