The stronger base among the given bases has to be explained
A chemical substance that gives hydrogen ions when dissolved in water is called as acid. A chemical substance that gives hydroxide ions in solution is called as base.
According to Bronsted definition of acid and base, an acid is substance that donates proton and a base is substance that accepts proton. Therefore, a substance which has more tendency to accept proton behaves more basic in nature.
The stronger base among the given bases