Question: which of the following declarations represents a pointer that cannot change the memory address that is stored in the pointer variable after being initialized with

which of the following declarations represents a pointer that cannot change the memory address that is stored in the pointer variable after being initialized with the integer x's address?
int * ptr = &x;
const int * ptr = &x;
int * const ptr = &x;
int * ptr const = &x;
None of the above

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