When amylases catalyse the hydrolysis of starch,the final product obtained is chiefly

Glucose forms many derivatives. The derivative which will help to prove the furanose structure is

$\alpha-D(+)$ glucose and $\beta-D(+)$ glucose are
$(i)$ Diastereomers
$(ii)$ Geometrical isomers
$(iii)$ Epimers
$(iv)$ Anomers
$(v)$ Enantiomers

What are the pairs of stereoisomers that differ in configuration at only one carbon atom called?

The incorrect statement among the following is:

Glucose molecule reacts with $X$ number of molecules of phenylhydrazine to yield osazone. The value of $X$ is