A homogeneous mixture of two or more substances is known as the-

Correct option is A

The correct answer is (a) Solution.
A solution is a homogeneous mixture of two or more substances where the solute (the substance being dissolved) is uniformly distributed within the solvent (the substance doing the dissolving). The mixture appears as a single phase, and the solute particles are not visible to the naked eye. Common examples include saltwater and sugar dissolved in water.
Additional Information:
· Fission : Fission refers to the splitting of an atomic nucleus into two or more smaller nuclei along with the release of energy. It is a nuclear process and not related to mixtures.
· Colloids : Colloids are mixtures where very small particles of one substance are evenly dispersed throughout another substance. The particles in a colloid are larger than those in a solution but still too small to settle out or be filtered easily. Examples include milk and gelatin.
· Suspension : A suspension is a heterogeneous mixture where larger particles are dispersed within a liquid or gas. These particles are large enough to settle out over time and can be separated by filtration. Examples include muddy water and sand in water.