The recently developed training system in grapes is called as

Correct option is D

✅ (d) Cardon [Modern Grapevine System] • The Cardon system is a recent innovation in grape training aimed at mechanization and improved yield. • Suitable for high-density planting and large-scale viticulture. • Encourages better light penetration and air circulation. • Developed mainly for commercial table grapes.
❌ (a) Telephone • Traditional system involving overhead wires. • Not a recently developed one.
❌ (b) Kniffing • An old German grape training system, not modern.
❌ (c) Y-trellis • Used in grape training but not the latest system introduced.