Which of the following statements is incorrect regarding $Ribose$ sugar?

For the below given cyclic hemiacetal $(X)$,the correct pyranose structure is.

Gun-cotton is obtained when conc. nitric acid reacts with

$\alpha-D$-glucose and $\beta-D$-glucose differ from each other due to the difference in the configuration of their carbon atom at:

Which of the following carbohydrates is an essential component of the plant cell wall?

Given below are two statements:
Statement $I:$ Fructose does not contain an aldehydic group but still reduces Tollen's reagent.
Statement $II:$ In the presence of base,fructose undergoes rearrangement to give glucose.
In the light of the above statements,choose the correct answer from the options given below: