Which among these samples are not a suspension?
D
B
A
A suspension is defined as a heterogeneous mixture of particles with a diameter greater than 1000 nm such that the particles are visible to naked eyes. If a suspension is left undisturbed, the particles are likely to settle to the bottom. The particles in a suspension are larger than those in either a colloid or a solution. Chalk water is an example of a suspension whereas milk, copper sulphate, common salt gets completely dissolved in water.