States of matter are generally classified as solid, liquid, gas and plasma (so we remove metal in the choices). One of the factors that allow them to have the characteristics is how the molecules are attracted to each other. The closer the molecules to each other the higher the intermolecular forces of attraction. Solid have definite shape and volume because the molecules have the greatest forces of attraction to each other. The trend for the strength of attractive force is solid > liquid > gas ~ plasma.
Answer: 2. Solid