Explanation

(b)
Suspension Colloidal solution True solution
Particle size
>100 nm 1nm-100nm < 1 nm
Colloidal solution is a heterogeneous solution which contains particles of intermediate size. The particles of a colloidal solution have diameters between 1 to 100 nm. Colloidal solution shows the optical property (i.e.,Tyndall effect and Brownian movement).