$\begin{array}{1 1} \text{a. Aldo triose sugar} \\ \text{b. Aldo pentose sugar} \\ \text{c. Keto triose sugar} \\ \text{d. Keto pentose sugar } \end{array} $
$\begin{array}{1 1} \text{a. Aldo triose sugar} \\ \text{b. Aldo pentose sugar} \\ \text{c. Keto triose sugar} \\ \text{d. Keto pentose sugar } \end{array} $
