Correct option is A
✅ (a) Undulated soil: • Sprinkler irrigation works best in undulated or uneven terrain, where other surface irrigation methods are inefficient. • It distributes water uniformly like rainfall, even on slopes or hilly land. • Also ideal for sandy soils and water-scarce areas.
❌ (b): • Surface irrigation is more suitable for well-levelled soil.
❌ (c): • Heavy soils may cause water stagnation; drip or furrow methods are better there.