Explanation:

In a resumption of bilateral and multilateral military exercises which were deferred due to coronavirus (COVID-19), India will take part in the Russian Kavkaz 2020 strategic command-post exercise next month.

• Russia holds a major military exercise every year at one of its four military Commands i.e Vostok (East), Zapad (West), TSENTR (Centre) and Kavkaz (South).
• The Kavkaz 2020 is also referred to as Caucasus-2020.
• The exercise is aimed at assessing the ability of the armed forces to ensure military security in Russia’s southwest, where serious terrorist threats persist and preparing for the strategic command-staff drills.
• A small tri-service contingent of India will take part.
• The invitation for participation has been extended to at least 18 countries including China, Iran, Pakistan and Turkey apart from other Central Asian Republics part of the SCO.

Hence option 2nd is correct.