Which of the following nuclear reactions results in the emission of a neutron?

• A
  $_{96}Am^{240} + _{2}He^{4} \to _{97}Bk^{244} + _{+1}e^{0}$
• B
  $_{15}P^{30} \to _{14}Si^{30} + _{1}e^{0}$
• C
  $_{6}C^{12} + _{1}H^{1} \to _{7}N^{13}$
• D
  $_{13}Al^{27} + _{2}He^{4} \to _{15}P^{30} + _{0}n^{1}$