Which of the following is not a semisynthetic polymer. \( \mathrm{P} \) (1) cis-polyisoprene (2)...

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Which of the following is not a semisynthetic polymer.
\( \mathrm{P} \)
(1) cis-polyisoprene
(2) cellulose nitrate
W)
(3) cellulose acetate
(4) valcanised rubber
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