In which year was the Defence Research and Development Organisation established?

Correct Answer: Option D — **1958**. **1958** is the accurate answer because DRDO was formed in 1958 by combining existing defence science and technical organisations. This identifying fact establishes its correct connection with organisation history and distinguishes it from the other defence-related choices. Why the other options are incorrect: Option A — **Multi-barrel rocket launcher**: This is actually associated with artillery rocket system; specifically, Pinaka is an indigenous multi-barrel rocket launcher system used for area targets and artillery fire support. Option B — **Multirole fighter aircraft**: This is actually associated with combat aircraft; specifically, Rafale is a twin-engine multirole combat aircraft capable of air-to-air and air-to-ground missions. Option C — **Surya Kiran**: This is actually associated with army exercise; specifically, Surya Kiran is a recurring joint training exercise between the armies of India and Nepal. Exam Takeaway: Link **1958** with its exact **organisation history** association for fast **Indian Defence GK** revision.