Identify the correct decreasing order of boiling points for different organic compounds from following.

Which among the following functional groups is reduced by diborane?

Which among the following is NOT dicarboxylic acid?

Identify the product ' B ' in the following sequence of reactions.

$$ \text { Methylpropanoate } \xrightarrow[\text { dil. } \mathrm{NaOH}]{\Delta} \mathrm{A} \xrightarrow[\text { Conc. } \mathrm{HCl}]{\mathrm{H}^{+}} \mathrm{B} $$