Which of the following systems will show the Tyndall effect?

The Tyndall Effect is the result of light scattering as it passes through a medium with minute suspended particles.
For example, smoke, dust, and scattered particles.

We'll talk about the prerequisites for the Tyndall effect first.
Only colloidal solutions or relatively few suspensions exhibit the Tyndall effect.
This result is used to confirm if a certain solution contains a colloid.
The sodium chloride, glucose, and area solutions in the example are real solutions. In a solution, the particles are incredibly tiny.
They therefore do not exhibit the Tyndall effect.

Al(OH)₃ in aqueous solution is a colloidal solution and exhibits the Tyndall effect.
In light of the foregoing argument, aqueous solution of aluminium hydroxide is the best choice.
A colloid prevents a light beam from passing through it fully because of the colloidal particles present in the solution.
They light-disperse.
The light beam's course is so apparent thanks to dispersion.

Colloidal particle size should range from 40 to 900 nanometers 1nanometer=10⁻⁹meter.

Thus, the correct option is (B).