How many phases are present in a colloidal solution?

Identify the option having the correct set of True $(T)$ or False $(F)$ statements with respect to colloidal solutions:
$(I)$ Lyophobic colloids are heavily solvated by the dispersion medium.
$(II)$ Multimolecular colloids are usually lyophilic.
$(III)$ Surface tension of a starch aqua sol will be lesser than that of water.
$(IV)$ Blood gets coagulated by the addition of $NaCl$.

Light scattering in colloidal particles is

Which of the following nanostructures includes nanotubes as an example?

How do emulsifying agents stabilize the emulsion?

The properties of a colloidal solution are primarily due to: