An ideal solution obey Raoult’s law at all temperature and pressures.
The solute-solute and solvent-solvent interactions are similar to solute-solvent interactions.
1. Benzene + Toluene $ightarrow$ Ideal solution
2. Chlorobenzene $+1,2$-dichlorobenzene $ightarrow$ Ideal solution
3. Methyl iodide + Isopropanol $ightarrow$ Non-ideal solution
4. Ethyl bromide + Methyl bromide $ightarrow$ Ideal solution
Hence, only methyl iodide and isopropanol is not an ideal solution.