The correct statement of the following is:

  • A
    The $Q$-value of a nuclear process is the difference between final and initial kinetic energies.
  • B
    The nuclear mass is always higher than the total mass of its constituents.
  • C
    Nuclides with same number of neutrons in the nucleus are known as isotopes.
  • D
    In nuclear fusion,a heavy nucleus breaks into two smaller fragments.

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