$\mathrm{B}\left(\mathrm{mix}\right)\underset{2}{\overset{\mathrm{conc}.\mathrm{HI}}{\leftarrow }}{\left({\mathrm{CH}}_3\right)}_2\mathrm{C}-\mathrm{O}-\mathrm{C}{\mathrm{H}}_3\underset{1}{\overset{\text{anhydrous HI}}{\to }}\mathrm{A}\left(\mathrm{mix}\right)$

A is mixture of CH₃I and (CH₃)₃C-OH B is a mixture of CH₃OH and (CH₃)₃C-I

A is mixture of CH₃OH and (CH₃)₃OH;B is mixture of CH₃I and (CH₃)₃I

A and B are identical mixture of CH₃I and (CH₃)₃C-OH

A and B are identical mixture of CH₃OH and (CH₃)₃C-I