Which of the following is the correct formula | vedclass

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(C) $1$. Structure $(i)$ represents Glyptal (polyethylene terephthalate is different,Glyptal is a polyester of ethylene glycol and phthalic acid). The

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$(ii), (iii)$

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(C) $1$. Structure $(i)$ represents Glyptal (polyethylene terephthalate is different,Glyptal is a polyester of ethylene glycol and phthalic acid). The structure shown is incorrect for Glyptal.$2$. Structure $(ii)$ represents the cross-linked structure of Bakelite,which is a phenol-formaldehyde resin. This is correct.$3$. Structure $(iii)$ represents the repeating unit of Nylon $6,6$,which is formed by the condensation of hexamethylenediamine and adipic acid. This is correct.Therefore,$(ii)$ and $(iii)$ are correct.

Which of the following is the correct formula for the given polymer?

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