1.

Which of the following is Buna -NA. `-[CH_2-CH=CH-CH_2-CH_2-overset(C_6H_5)overset(|)CH]_n-`B. `-[CH_2-CH=CH-CH_2-CH_2-overset(CN)overset(|)CH]_n-`C. `-[CH_2-CH_2-CH_2-CH_2-CH_2-overset(CN)overset(|)CH]_n-`D. `-[CH_2-CH_2-CH=CH-CH_2-overset(CN)overset(|)CH]_n-`

Answer» Correct Answer - B


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