\[
\mathrm{C}_{2} \mathrm{H}_{4} \stackrel{\mathrm{Br}_{2}}{\longri...
\[
\mathrm{C}_{2} \mathrm{H}_{4} \stackrel{\mathrm{Br}_{2}}{\longrightarrow} \mathrm{X} \stackrel{\text { KCN }}{\longrightarrow} \mathrm{Y} ; \mathrm{Y} \text { is }
\]
(A) \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CN} \)
(B) \( \mathrm{NC}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CN} \)
(C) \( \mathrm{Br}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{CN} \)
(D) \( \mathrm{Br}-\mathrm{CH}=\mathrm{CHCN} \)
\( \mathrm{P} \)
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