What will be the output of the following C++ code? #include using namespace std; class sample; class sample1 int width, height; public: int area () return (width * height); void convert (sample a); ; class sample private: int side; public: void set_side (int a) side = a; friend class sample1; ; void sample1::convert (sample a) width = a.side; height = a.side; int main () sample sqr; sample1 rect; sqr.set_side(6); rect.convert(sqr); cout << rect.area(); return 0;

Answer: Option D