Which equation represents a fission reaction?
A. 14/7 N + 1/1 H --> 15/8O
B. 235/92 U + 1/0 n --> 94/37RB + 2 1/0 n
C. 9/4 Be + 4/2 He --> 12/6 C + 1/0 n
D. 239/93 Np --> 239/94 Pu + 0/-1 e