Bonus question An optically active D-aldohexose was treated…

Bonus question An optically active D-aldohexose was treated with NaBH4 / H2O and produced an optically inactive alditol. When the same D-aldohexose was subjected to Wohl degradation followed by HNO3, it produced an optically inactive aldaric acid. Provide the name of this D-aldohexose.