2 mL of a solution containing 95 mg/mL
============
To determine which is stronger, we need to compare the amount of active ingredient in both cases.
In the first case, ½ of a 250 mg tablet contains 250 mg * 1/2 = 125 mg of the active ingredient.
In the second case, 2 mL of a solution containing 95 mg/mL contains 2 mL * 95 mg/mL = 190 mg of the active ingredient.
Therefore, 2 mL of the solution is stronger than ½ of a 250 mg tablet.