What will be the output of the following C++ code?
#include<iostream>
using namespace std;
int main()
{
int x = 10;
int& ref = x;
ref = 20;
cout << x << endl ;
x = 30;
cout << ref << endl;
return 0;
}
#include<iostream>
using namespace std;
int main()
{
int x = 10;
int& ref = x;
ref = 20;
cout << x << endl ;
x = 30;
cout << ref << endl;
return 0;
}A. 20
30
B. 10
10
C. 10
20
D. 10
30
Answer: Option A

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