Which student's question would be the MOST useful to determine this?

Student 2, because only Bronsted-Lowry bases will neutralize acids.

Student 3, because the pOH can be used to calculate the pH of the base.

Student 4, because a Bronsted-Lowry base always accepts a proton from an acid to form a conjugate acid.

Student 1, because if the base reacts with an acid and produces water and a salt it is a Bronsted-Lowry base.