A nucleus of mass $$M + \Delta m$$ is at rest and decays into two daughter nuclei of equal mass $$\frac{M}{2}$$ each. 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

$$E_2 = 2 E_1$$

B

$$E_1 > E_2$$

C

$$E_2 > E_1$$

D

$$E_1 = 2 E_2$$