Which of the following compounds will not react with $NaHSO_3$?

Identify the set in which $X$ and $Y$ are correctly matched for the reaction of benzaldehyde with a reagent $X$ to form product $Y$.

The end product $(B)$ of the above reaction is:

Which of the following compounds undergoes maximum hydration?

The major product $Y$ in the following reaction is:

Draw structures of the following derivatives:
$(i)$ The $2,4-$dinitrophenylhydrazone of benzaldehyde
$(ii)$ Cyclopropanone oxime
$(iii)$ Acetaldehyde dimethyl acetal
$(iv)$ The semicarbazone of cyclobutanone
$(v)$ The ethylene ketal of hexan$-3-$one
$(vi)$ The methyl hemiacetal of formaldehyde