Creating pointer to reference in C++

We know that a reference is an alias of the data object it refers to. What happens when we assign the address of a reference to a pointer? Let's look at the following code:

int x = 10;
int& ref = x; 
auto ptr = &ref;

Would ptr contain the address of x or of ref? To answer this question you should know whether there is any difference between &ref and &x.

Select whether the equality test ptr == &x will return true or false ?