Which of the following statements is not correct?

Given the structure of $D-(+)$-glucose as shown below,identify the structure of $L-(-)$-glucose.

The reaction of $D$-glucose with ammoniacal $AgNO_3$ produces:

The optical rotation of the $\alpha$-form of a pyranose is $+150.7^{\circ}$,that of the $\beta$-form is $+52.8^{\circ}$. In solution,an equilibrium mixture of these anomers has an optical rotation of $+80.2^{\circ}$. The percentage of the $\alpha$-form in the equilibrium mixture is $....... \%$.

Select the incorrect pair.

$A$ $D$-carbohydrate is: