What is the output of the following C++ program?#include using namespace std; class B { public: virtual ~B() { cout

What is the output of the following C++ program?

#include <iostream>
using namespace std;
class B { public: virtual ~B() { cout << "B"; } };
class D : public B { public: ~D() { cout << "D"; } };
int main() { B *p = new D(); delete p; }