# A typical compound under goes Cannizzaro's reaction as well as aldol condensation.The possible compound is

$\begin{array}{1 1}(a)\;CH_3CH_2CHO\\(b)\;C_6H_5CHO\\(c)\;HCHO\\(d)\;(CH_3)_2CHCHO\end{array}$

under go cannizzaro's reaction as well as aldol.Because
less stable.
Hence (d) is the correct answer.