The correct option is A True
Do you agree that solute and solvent is applicable only when we have one component dissolved in another component?
If yes, then this is possible only in solutions because they are the only ones with a single phase where the solute particles are completely dissolved in the solvent giving rise to a homogeneous mixture.
So, the concept of solute and solvent is defined only for solutions.
For colloids, we have a dispersed phase and a dispersion medium.
For suspensions, we don't have any particular naming system.