An organic compound [A], molecular formula ${\mathrm{C}}_{10}{\mathrm{H}}_{20}{\mathrm{O}}_2$ was hydrolyzed with dilute sulphuric acid to give a carboxylic aicd [B] and an alcohol [C]. Oxidation of $\left[\mathrm{C}\right]$ with ${\mathrm{CrO}}_3$ $-{\mathrm{H}}_2{\mathrm{SO}}_4$ produced [B]. Which of the following structures are not possible for $\left[\mathrm{A}\right]$ ?