Which of the following conservation laws must be obeyed in a nuclear reaction?

Conservation Laws in Nuclear Reactions:

Conservation of nucleons: The total number of nucleons before and after a reaction are the same.
Conservation of charge: The sum of the charges on all the particles before and after a reaction are the same.
Conservation of momentum: The total momentum of the interacting particles before and after a reaction is the same.
Conservation of energy: Energy, including rest mass energy, is conserved in nuclear reactions.