Correct option is D
✅ (d) 18–20 kg: • Hybrid rice requires less seed because it produces more tillers and has a higher yield potential. • Standard seed rate in nursery for transplanting 1 hectare is about 18–20 kg. • Helps in cost saving and efficient seedling management.
❌ (a), (b), (c): • These rates apply more to conventional or high-yielding varieties, not hybrids.