To determine which compound has intramolecular hydrogen bonding, we need to analyze the structures.$\\$Intramolecular hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom (like $O, N,$ or $F) \\$within the same molecule, allowing it to form a hydrogen bond with another electronegative atom in close proximity.$\\$Let's examine the options:$\\$Option 1:$\\$The structure is 2-nitrophenol. The $OH$ group is ortho to the $NO_2$ group.$\\$This allows the hydrogen from the $OH$ group to form a hydrogen bond with the oxygen of the $NO_2$ group.$\\$Therefore, intramolecular hydrogen bonding is possible.$\\$Option 2:$\\$The structure is $HF. \\$This is a diatomic molecule, so intramolecular hydrogen bonding is not possible.$\\$Option 3:$\\$The structure is 2-nitrophenol (same as Option 1).$\\$Intramolecular hydrogen bonding is possible for the same reasons as in Option 1.$\\$Option 4:$\\$The structure is 4-nitrophenol. The $OH$ group is para to the $NO_2$ group.$\\$This spatial arrangement does not favor intramolecular hydrogen bonding.$\\$Conclusion:$\\$Intramolecular hydrogen bonding is present in Option 3 (2-nitrophenol).$\\$Therefore, the correct option is Option 3.