Answer : 3. "Defense sector"
Explanation :

Defense Minister Rajnath Singh launched 'ADITI scheme' to promote innovations in critical and strategic defense technologies during DefConnect 2024 in New Delhi. Under the scheme, start-ups will be eligible to receive grant assistance of up to Rs 25 crore for their research, development and innovation efforts in defense technology. Rs 750 crore has been allocated under this scheme for the period 2023-24 to 2025-26.