The right answer is Hydrogen bonds with the polar end of the phospholipid molecule.
A phospholipid contains a phosphoric acid group as mono or di-ester. Â
The physicochemical properties of phospholipids depend both on the polar molecule of the hydrophilic head and on the aliphatic chains of the hydrophobic tails. In an aqueous medium, such amphiphilic molecules tend to be organized so that only their hydrophilic head is in contact with the water molecules, which typically results in structures in micelle, liposome or lipid bilayer.
