Which of the following statements is incorrect?

A - 0.25 mole of C has the same number of atoms as 0.25 mole of Hg.
B - 1 mole of hydrogen atoms equals 1 mole of helium atoms.
C - 1 mole of carbon atoms and 1 mole of oxygen atoms are a 1:1 ratio.
D - 1 mole of xenon atoms is more than 1 mole of neon atoms.