Correct Answer - B
The dehydration of 1-butanol gives 2-butene as the main product because `2^(@)` carbocation is stabler than `1^(@)`.
`underset("Butan-1-ol")(CH_(3)CH_(2)CH_(2)CH_(2)OH) underset(-H_(2)O)overset(H^(+))rarrCH_(3)CH_(2)-CH_(2)underset((1^(@)))(-CH_(2)^(+)) overset("H-shift")rarr underset((2^(@)))(CH_(3)CH_(2))-overset(o+)(CH)-CH_(3) underset(-H^(+))rarr underset("2-Butene")(CH_(3)-CH=CH-CH_(3))`
