Explanation:

1, 2and 3

• The DRDO Rustom (English: Warrior) is a Medium Altitude Long Endurance unmanned air vehicle (UAV) being developed by Defence Research and Development Organisation for the three services, Indian Army, Indian Navy and the Indian Air Force of the Indian Armed Forces.
• Lakshya is an Indian remotely piloted high speed target drone system developed by the Aeronautical Development Establishment of DRDO. A variant Lakshya-1 is used to perform discreet aerial reconnaissance of battlefield and target acquisition.
• The Nishant UAV is primarily tasked with intelligence gathering over enemy territory and also for reconnaissance, training, surveillance, target designation, artillery fire correction, damage assessment, ELINT and SIGINT. The UAV has an endurance of four hours and thirty minutes. It is developed by India's Aeronautical Development Establishment (ADE), a branch of Defence Research and Development Organisation (DRDO).

Hence option 3rd is correct.