A is marking the solvent molecules which is marked in blue. And B is marking the whole solution.
Option C
Step-by-step explanation:
A solution is defined as the homogeneous mixture of a solute in a solvent in a range of concentration where generally solvent is more in amount than in solution.
A solute is the component of the solution which is generally less in amount and is homogenously mixed with the solution. Here they are marked in blue. And the molecules that are representing the solvent are marked in orange colour. The solute and the solvent total makes the solution which is marked by B.