Identify the product 'B' in the following reaction 

Dry ice \(\xrightarrow[\text { Dry ether }]{\mathrm{CH}_{3} \mathrm{MgBr}} \mathbf{A} \xrightarrow[\text { dil. } \mathrm{HCl}]{\mathrm{H}_{2} \mathrm{O}} \mathbf{B}\)