The correct order of dipole moments of HF, H2S and H2O is

Q. The correct order of dipole moments of HF, H2S and H2O is

1. HF < H2S < H2O
2. HF < H2S < H2O
3. HF < H2S < H2O
4. HF < H2O < H2S

Answer: HF < H2S < H2O