Explanation:

• The Defence Research and Development Organisation (DRDO) observed the 63rd Foundation Day of its establishment on January 01, 2021.
• DRDO was established in 1958 with just 10 laboratories to enhance the research work in Defence sector.
• At that time, it was tasked with designing and developing cutting edge defence technologies for Indian Armed Forces.
• Dr G Satheesh Reddy – Secretary Department of Defence Research and Development (DDR&D) & Chairman DRDO.