Explain why propanol has higher boiling point than that of the hydrocarbon, butane?

Options

1. APropanol has a greater number of carbon atoms than butane, leading to stronger London dispersion forces.
2. BPropanol exhibit hydrogen bonding due to presence of an -OH group, while butane does not.
3. CPropanol has a more complex molecular structure, resulting in increased intermolecular forces.
4. DPropanol has a higher molecular weight than butane, leading to stronger van der Waals forces.