Predict the product \( \mathrm{C} \) obtained in the following reaction of butyne-1. \[ \mathrm{...

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Predict the product \( \mathrm{C} \) obtained in the following reaction of butyne-1.
\[
\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{CH}+\mathrm{HCl} \longrightarrow \mathrm{B} \stackrel{\mathrm{HI}}{\longrightarrow} \mathrm{C}
\]
(a)
(b)
(c)
(d)
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