How many political parties were allowed in the soviet union ?

The following is a list of political parties in the Soviet Union:

Communist Party of the Soviet Union (established in January 1912, dissolved in August 1991)
Liberal Democratic Party of the Soviet Union (established in March 1989, dissolved in April 1991)
Liberal Democratic Party of Russia (established in April 1991 as a successor to the LDPSU)

3. Communist Party of The Soviet Union (est. 1912. dissolved 1991), Liberal Democratic Party of The Soviet Union (est. 1989. dissolved 1991), Liberal Democratic Party of Russia (est. 1991 to replace LDPSU)

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