Correct Answer - B
Teritary halic can involve elimination of HX to give aleken in presence of a base. Hence, a tertiary alkoxide and primary akyl halide is take for the reaction.
`underset(" sod. t-butoxide"" ""methyl t-butyl ether")(CH_3Br+NaOC(CH_3)_3rarr CH_3O-C(CH_3)_3+NaBr)`