The above is a plot of binding energy per nucleon $E_b$, against the nuclear mass M; A, B, C, D, E, F correspond to different nuclei. Consider four reactions : <br> (i) $A + B \to C + \varepsilon \; \; \; \;$ (ii) $C \to A + B + \varepsilon \; \; \; \;$ (iii) $D+ E \to F + \varepsilon \; and \; \; \; \;$ (iv) $F \to D + E + \varepsilon$ <br> where $\varepsilon$ is the energy released ? In which reactions is $\varepsilon$ positive ? <br>

Question

( A ) (ii) and (iii)
( B ) (i) and (iv)
( C ) (i) and (iii)
( D ) (ii) and (iv)