Which of the following reactions are correct?

A.



B.



C.



D.



this is dehydrohalogenation of cyclohexyl bromide which involves removal of (elimination of) a hydrogen halide ..


Alcoholic KOH forms hydroxide ions act as a strong nucleophile and replaces the halogen atom from cyclohexyl halide which later leads to formation of cyclohexene.


For option (i) this reaction is preparation of alkyl amines from an alkyl halide treating with ammonia.


Other 2 options (i) and (iv ) are not possible.

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