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Which of the following is a natural polymer?

1. poly (Butadiene-styrene)
2. polybutadiene
3. poly (Butadiene-acrylonitrile)
4. cis-1, 4-polyisoprene

Correct answer: cis-1, 4-polyisoprene

Solution

Cis-1,4-polyisoprene is a natural polymer as it is the main component of natural rubber, derived from latex of rubber trees. The other options are synthetic polymers.

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