The destructor automatically executes when the class object goes out of
a.
scope
b.
use
c.
phase

scope    

Explanation:

Destructor is a member function and it call automatically when the class object goes out of scope.

Out of scope means, the program exit, function end etc.

Destructor name must be same as class name and it has no return type.

syntax:

~class_name() { };

For example:

class xyz{

  xyz(){

        print(constructor);

   }

~xyz(){

        print(destructor);

   }

}

int main(){

    xyz num;

}//end program

when the object is create the constructor will called and when the program end destructor will call automatically.