Which of the Following Statements Is False

Which of the following statements is false?

A) The proton and the neutron are primarily responsible for the mass of an atom
B) The charge on electrons and protons are equal in magnitude but opposite in sign
C) The mass of a proton and a neutron are approximately the same
D) The mass of a proton is approximately one gram
E) A neutron, as its name suggests, is electrically neutral