Explanation:

- Option 1: DRDO

- DRDO is the Defence Research and Development Organisation.

- It's responsible for military research and development.

- Option 2: ISRO

- ISRO stands for the Indian Space Research Organisation.

- It is responsible for space research and satellite launches.

- ISRO launched "Project NETRA", a space situational awareness program.

- Option 3: CSIR

- CSIR is the Council of Scientific and Industrial Research.

- It focuses on scientific research and development in various fields.

- Option 4: HAL

- HAL stands for Hindustan Aeronautics Limited.

- It is involved in the aerospace and aviation sector.

- Option 5: None of the above

- This option usually indicates that none of the given options is correct.