Which of the following statement is correct about the program given below?

#include<iostream.h> 
class AptitudeBase
{
    int x, y; 
    public:
    AptitudeBase(int xx = 10, int yy = 10)
    {
        x = xx;
        y = yy;
    }
    void Show()
    {
        cout<< x * y << endl;
    }
};
class AptitudeDerived : public AptitudeBase
{
    private:
        AptitudeBase objBase; 
    public:
    AptitudeDerived(int xx, int yy) : AptitudeBase(xx, yy), objBase(yy, yy)
    {
        objBase.Show();
    }
};
int main()
{
    AptitudeDerived objDev(10, 20);
    return 0; 
}