$A$ nucleus of mass $M + \Delta m$ is at rest and decays into two daughter nuclei of equal mass $\frac{M}{2}$ each. The speed of light is $c$. The binding energy per nucleon for the parent nucleus is $E_1$ and that for the daughter nuclei is $E_2$. Then:
- A$E_1 = 2E_2$
- B$E_2 = 2E_1$
- C$E_1 > E_2$
- D$E_2 > E_1$
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