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Correct Answer: Option C — **Varuna**. **Varuna** is the accurate answer because Varuna is the established bilateral maritime exercise of the Indian and French navies. This identifying fact establishes its correct connection with naval exercise and distinguishes it from the other defence-related choices. Why the other options are incorrect: Option A — **8 October**: This is actually associated with commemorative day; specifically, the Indian Air Force was officially established on 8 October 1932. Option B — **Light combat aircraft**: This is actually associated with aircraft classification; specifically, Tejas is an indigenous lightweight, multirole combat aircraft developed for the Indian Air Force and naval technology programmes. Option D — **Guided-missile destroyer**: This is actually associated with surface combatant; specifically, INS Kolkata is the lead ship of an Indian Navy class of guided-missile destroyers. Exam Takeaway: Link **Varuna** with its exact **naval exercise** association for fast **Indian Defence GK** revision.
