When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is (numeral)
CHO|CH2|CHOH|CHOH|CHOH|CH2OH
The D-form of given sugar is
Hence, there are three chiral carbon atoms.
∴ Total number of steriosomers of D-pyransoe is 23 = 8