Answer : 2. "रक्षा क्षेत्र"
Explanation :

Defense Minister Shri Rajnath Singh launched the Accelerating Development of Innovative Technologies with iDEX (ADITI) scheme in New Delhi on March 04, 2024, with an allocation of Rs 750 crore for 2023-24 to 2025-26. Operated under the iDEX framework, the scheme supports start-ups with grants of up to Rs 25 crore for defense technology research. ADITI aims to develop 30 deep-tech critical technologies with 17 challenges in its inaugural edition, foster youth innovation and meet the needs of the armed forces.