Identify the set of reagents/ reaction condition ‘X’ and ‘Y’ in the following set of transformations :
`CH_(3)-CH_(2)-CH_(2)Br overset(X)to "Product" overset(Y)to CH_(3)-underset(Br)underset(|)CH-CH_(3)`

Options

A. X=dil. Aquous NaOH, `20^(@)C,Y=Br_(2)//CHCl_(3),0^(@)C`41
B. X=conc. Alcoholic NaoH, `80^(@)C`, Y=HBr/acetic acid, `20^(@)C`
C. X = dil. Aqueous acid, NaOH, `20^(@)C`, `Y = Br_(2)//CHCl_(3), 0^(@)C`
D. X = conc. Alcoholic NaOH, `80^(@)C`
`Y = Br_(2)//CHCl_(3), 0^(@)C`

Answer

B

Explanation

Conc. Alc. NaOH at `80^(@)`C brings about dehydrohalogenation while HBr/acetic acid at `20^(@)C` brings about Markovnikov's addition.