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Cpp Programming Quiz 17- Which of the following statement is correct about the program given below?

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

#include
int x, y;
class BixTest
{
public:
BixTest(int xx = 0, int yy = 0)
{
x = xx;
y = yy;
Display();
}
void Display()
{
cout<< x << " " << y << " "; } }; int main() { BixTest objBT(10, 20); int &rx = x; int &ry = y; ry = x; rx = y; cout<< rx--; return 0; }

[A].The program will print the output 0 0 10.
[B].The program will print the output 10 20 10.
[C].The program will print the output 10 20 9.
[D].It will result in a compile time error. 

Answer: Option B