A nuclear reaction is given by

${}_Z{X^A} \to {}_{Z + 1}{Y^A} + {}_{ - 1}{e^0} + \bar v$ , represents

  • [AIIMS 2012]
  • A

    fission

  • B

    $\beta  - $ decay

  • C

    $\sigma  - $ decay

  • D

    fusion

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