Deuterium and Tritium

The nuclear reaction formula for a nuclear fusion between a deuterium and a tritium can be expressed as follows: $_{1}^{2}\textrm{H} + _{1}^{3}\textrm{H} \to _{2}^{4}\textrm{He} + [A] + \text{energy}.$ Which of the following statements is correct about this nuclear reaction?

a) $_{1}^{2}\textrm{H}$ and $_{1}^{3}\textrm{H}$ have the same number of neutrons.

b) Particle [A] has no net electron charge.

c) The energy release is due to mass defect.