Major product ' B ' of the following reaction sequence is

First step of the reaction involves electrophilic addition of ${\mathrm{Br}}_2 \mathrm{in} {\mathrm{CH}}_3\mathrm{OH}$ to $2-\mathrm{methyl} \mathrm{but}-2-\mathrm{ene}$to form A which contains an ether linkage.

A, undergoes cleavage reaction with HI by ${\mathrm{S}}_{\mathrm{N}}1$ mechanism to form B as the major product as shown in the reactions below