Answer : The given statement is true.
Explanation :
Ionic product of water : It is defined as the product of the concentration of hydrogen ion and the concentration of hydroxide ion.
When the concentration of hydrogen ion and hydroxide ion are equal in the solution then the solution is neutral.
When the concentration of hydrogen ion are more in the solution then the solution is acidic in nature.
When the concentration of hydroxide ion are more in solution then the solution is basic in nature.
As per question, the addition of a base in the solution increases the concentration of hydroxide ion and decreases the concentration of hydrogen ion.
Hence, the given statement is true.