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Correct Answer: Option B — **Multi-barrel rocket launcher**. **Multi-barrel rocket launcher** is the accurate answer because Pinaka is an indigenous multi-barrel rocket launcher system used for area targets and artillery fire support. This identifying fact establishes its correct connection with artillery rocket system and distinguishes it from the other defence-related choices. Why the other options are incorrect: Option A — **Beyond-visual-range air-to-air missile**: This is actually associated with air-combat missile; specifically, Astra is an indigenous beyond-visual-range air-to-air missile intended for fighter aircraft. Option C — **Operation Cactus**: This is actually associated with overseas military operation; specifically, Operation Cactus rapidly deployed Indian forces to assist the Maldivian government during the coup attempt. Option D — **Khadakwasla, Pune**: This is actually associated with training institution; specifically, the tri-service academy trains cadets of the Army, Navy and Air Force before service-specific training. Exam Takeaway: Link **Multi-barrel rocket launcher** with its exact **artillery rocket system** association for fast **Indian Defence GK** revision.
