Following Questions of a paragraph has only one correct answer among the four choices(A), (B), (C) and (D).

The mass of a nucleus $$_{Z}^{A}X$$ is less than the sum of the masses of (A-Z) number of neutrons and Z number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus. A heavy nucleus of mass M can break into two light nuclei of masses $$m_1$$ and $$m_2$$ only if $$(m_1 + m_2) < M$$. Also two light nuclei of masses $$m_3$$ and $$m_4$$ can undergo complete fusion and form a heavy nucleus of mass $$M'$$ only if $$(m_3 + m_4) > M'$$. The masses of some neutral atoms are given in the table below: