Which of the following represents the correct structure of $\beta-D-(-)-$Fructofuranose?

Which of the following is present in $RNA$ only?

Which of the following carbohydrates cannot reduce Tollen's reagent?

How many $-OH$ groups are present in each glucose unit of tri-nitro cellulose?

Glucose has which functional group$(s)$?

The correct corresponding order of names of four aldoses with configurations given below,respectively,is:
$(1)$ $CHO-CH(OH)-CH(OH)-CH_2OH$ (both $-OH$ on right)
$(2)$ $CHO-CH(OH)-CH(OH)-CH_2OH$ ($-OH$ on left at $C-2$,right at $C-3$)
$(3)$ $CHO-CH(OH)-CH(OH)-CH_2OH$ (both $-OH$ on left)
$(4)$ $CHO-CH(OH)-CH(OH)-CH_2OH$ ($-OH$ on right at $C-2$,left at $C-3$)