Which statement is correct? (a) Buna-S is a synthetic and linear thermosetting polymer. (b) Neop...

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Which statement is correct?
(a) Buna-S is a synthetic and linear thermosetting polymer.
(b) Neoprene is addition copolymer used in plastic bucket manufacturing.
(c) Synthesis of Buna-S needs nascent oxygen.
(d) Buna- \( \mathrm{N} \) is a natural polymer.
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