C++ quiz. While transferring the array by reference, what is

While transferring the array by reference, what is displayed on the screen as a result of the execution of the program with the following code?

#include <iostream>

using namespace std;

void f(int (&a)[11])
{
    cout << sizeof(a) << endl;
}

int main()
{
    int a[10];
    cout << sizeof(a) << " ";
    f(a);

    return 0;
}

4 4
Depending on the platform
40 4
40 44
Compile error

Explanation

While transferring the array by reference, the dimension of the transferred array and specified array in the parameters of the function should be the same.