Solution :
Hydrogen bonding $$ \propto $$ electronegativity $$ \propto $$ $$\frac{1}{{{\text{Size of atom to which }}H{\text{ is covalently bonded }}}}$$
Since, $$F$$ is most electronegative and has smaller size,
$$HF$$ shows maximum strength of hydrogen bond.
Releted MCQ Question on Inorganic Chemistry >> Chemical Bonding and Molecular Structure
Releted Question 1
The compound which contains both ionic and covalent bonds is