Refer to the below reaction:

Question

 

Which one is true below?

$\begin{array}{1 1}a)\;Both\; products\; reduce\; Tollents\; reagent\\b)\; Both\; the\; products\; reduce\; Fehlings\; solution\\c)\;one\; of\; them \;will \;reduce\; Tollents\; reagent\\d)\;Both\; are\; optically\; inactive\end{array}$