The correct option is D van der Waals force < Hydrogen bonding < Covalent
A hydrogen bond is the electrostatic attraction which occurs between the hydrogen and an electronegative atom. A hydrogen bond is stronger than van der Waals force.
Stronger the bond, higher will be the stability. Since van der Waals force is the weakest interaction, covalent bond is the strongest among the three interactions given.
The correct order of increasing stability is:
van der Waals < Hydrogen bonding < Covalent bonding