1.

Structure of styrene butadine rubber is

Answer»

`(-CH_2-CH=CH-CH_2-CH_2-underset(|) CH-underset(C_(6)H_(5))(" ") )_n`
`(-CH_2-CH=CH-CH_2-CH_2-underset(|) CH-CH_2-underset(C_(6)H_(5))(" ") )_n`
`(-CH_2-CH=CH-CH=CH-underset(|) CH-underset(C_(6)H_(5))(" ") )_n`
`(-CH=CH-CH=CH-CH-underset(|) CH_2-underset(C_(6)H_(5))(" ") )_n`

ANSWER :A


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