What do you mean by the Commonwealth of Independent States - (CIS)?

An organisation of the countries, who came together after disintegration of the USSR.

The correct answer is Option 2: An organisation of the countries, who came together after disintegration of the USSR.

A coup took place in 1991 that was encouraged by Communist Party hardliners. The people had tasted freedom by then and did not want the old-style rule of the Communist Party. Boris Yeltsin emerged as a national hero in opposing this coup. The Russian Republic, where Yeltsin won a popular election, began to shake off centralised control. Power began to shift from the Soviet centre to the republics, especially in the more Europeanised part of the Soviet Union, which saw themselves as sovereign states. The Central Asian republics did not ask for independence and wanted to remain with the Soviet Federation. In December 1991, under the leadership of Yeltsin, Russia, Ukraine and Belarus, three major republics of the USSR, declared that the Soviet Union was disbanded. The Communist Party of the Soviet Union was banned. Capitalism and democracy were adopted as the bases for the post-Soviet republics.

The declaration on the disintegration of the USSR and the formation of the Commonwealth of Independent States (CIS) came as a surprise to the other republics, especially to the Central Asian ones. The exclusion of these republics was an issue that was quickly solved by making them founding members of the CIS.