Which of the following are multi-molecular colloids?

Multimolecular colloids are created when many small particles (dispersion phase) combine to form a big molecule or particle with a size in the colloidal range. Here, a weak van der Waals force of attraction holds the atoms together. For instance, gold sol contains particles in a variety of shapes and sizes. Sulphur Sol. is another illustration.
macromolecular colloids contain protein solutes, and related colloids contain soap solutions:

Hence, the correct option is a and c.