Oxygen, nitrogen, and fluorine bond with hydrogen to form molecules. these molecules are attracted to each other by
1. ionic bonds
2. hydrogen bonds
3. electrovalent bonds
4 coordinate covalent bonds

The oxygen, nitrogen, and fluorine bonds with hydrogen to produce molecules, these molecules are fascinated towards each other by hydrogen bonds.  

A hydrogen bond refers to a partially electrostatic attraction amid a hydrogen atom that is combined with a more electronegative group or atoms like oxygen, nitrogen, or fluorine. In this bonding, one is known as the hydrogen bond donor, and another atom adjacent to it exhibiting a lone pair of electrons is known as the hydrogen bond

1.solid

2.carbon dioxide

3.helium

the answer is b. dilution