In an atom in an atom: the nucleus is made of electrons and protons. protons have positive charges. neutrons have negative charges. all of the above.

In an atom:
A. The nucleus is made of protons and neutrons(not electrons).
B. Protons have positive charges.
C. Neutrons have no charges, they are neutral(not negative charges).
D. All of the above

So if you're asking which is true, B would correct.