Which is true about Buna-N? (a) It is a linear polymer of 1,3-butadiene. (b) It is obtained by c...

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Which is true about Buna-N?
(a) It is a linear polymer of 1,3-butadiene.
(b) It is obtained by copolymerization of 1,3-butadiene and styrene.
(c) It is obtained by copolymerization of 1, 3-butadiene and acrylonitrile.
(d) The suffix \( \mathrm{N} \) in Buna- \( \mathrm{N} \) stands for its natural occurrence.
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