Out of the given two compounds,the vapour pressure of $B$ at a particular temperature is:

In which of the following compounds does hydrogen bonding not play a role in its boiling point?

Hydrogen bonding is maximum in

The boiling points of $HF$, $HCl$, $HBr$ and $HI$ follow the order:

The incorrect order of boiling point is

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Dipole-dipole interactions are the only non-covalent interactions resulting in hydrogen bond formation.
Reason $R$: Fluorine is the most electronegative element and hydrogen bonds in $HF$ are symmetrical.