AIIMS 2015

Product of above reaction is AIIMS 2015

$\mathrm{P}$ will be:-  AIIMS 2016

$\mathrm{Ph}-\mathrm{CHO}+{\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2\mathrm{O}\underset{{\mathrm{CH}}_3\mathrm{COOH},\mathrm{\Delta }}{\overset{{\mathrm{CH}}_3\mathrm{CO}\stackrel{⊝}{\mathrm{O}}\stackrel{\oplus }{\mathrm{Na}}}{\to }}\mathrm{A}\underset{{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{LiAIH}}_4}{\to }}\mathrm{B},\mathrm{B}$ is:

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

Correct sequence of reagents to get the given:
product-  AIIMS 2018