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Q.

The following countries established Socialist Economies in 20th Century            

a) Union of Soviet Socialist Republics (USSR) – 1917            

b) Eastern Europe - 1945            

c) China - 1949            

d) Cuba and Vietnam - 1960

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a

abcd

b

a

c

ab

d

bcd

answer is A.

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The following countries established Socialist Economies in 20th Century            a) Union of Soviet Socialist Republics (USSR) – 1917            b) Eastern Europe - 1945            c) China - 1949            d) Cuba and Vietnam - 1960