The correct match between Item-$I$ and Item-$II$ :
Item-$I$ Item-$II$ $a$. Natural rubber $I$. $1,3-$butadiene $+$ styrene $b$. Neoprene $II$. $1,3-$butadiene $+$ acrylonitrile $c$. Buna$-N$ $III$. Chloroprene $d$. Buna$-S$ $IV$. Isoprene
| Item-$I$ | Item-$II$ |
|---|---|
| $a$. Natural rubber | $I$. $1,3-$butadiene $+$ styrene |
| $b$. Neoprene | $II$. $1,3-$butadiene $+$ acrylonitrile |
| $c$. Buna$-N$ | $III$. Chloroprene |
| $d$. Buna$-S$ | $IV$. Isoprene |
- A$a-III, b-IV, c-I, d-II$
- B$a-IV, b-III, c-II, d-I$
- C$a-IV, b-III, c-I, d-II$
- D$a-III, b-IV, c-II, d-I$
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