Which of the following is an acid - ammonia - potassium hydroxide - sulfuric acid - lithium hydroxide?

Ammonia (NH3)- when mixed into water - forms a basic solution.

potassium hydroxide (KOH)- when mixed into water - forms a basic solution.

lithium hydroxide (LiOH) - when mixed into water - forms a basic solution.

Sulfuric acid (H2SO4) - when mixed into water - forms an acid solution.