Option (d) None of the above.
The correct expression would be log(x + 2) (Not present in the options).
The first printf would produce (UINT_MAX – 2) == (4294967293) == ((2**32 – 1) – 2). The second printf basically prints the number of bits in an int. We can take x, add 2, (which would set all the bits), and then take a log2 to get the number of bits present in an int.