In the graph, Binding energy per nucleon $(\frac{BE}{N})$ against nuclear mass (M) is plotted. A, B, C, D, E, F correspond to different nuclei. Consider following four reactions where Q is the energy released. In which reaction Q is positive?

(A) C → A + B + Q
(B) F → D + E + Q
(C) A + B → C + Q
(D) D + E → F + Q

Choose the correct answer from the options given below:

(B) and (C) only

Lighter nuclei $A$ and $B$ can fuse to form a heavier nucleus C. In these fusion reactions, there is a mass defect giving rise to a release in energy.

On the other hand, a heavy nucleus $F$ can be split into two nuclei $D$ and $E$ of moderate masses. In this fission reaction also, there is a mass defect which appears in the form of release of energy. Thus energy is released in the processes $(B)$ and $(C)$.