What happens to the mass number and atomic number of an element when it emits $\gamma$-radiation?

  • [NEET 2020]
  • A

    Mass number increases by four and atomic number increases by two.

  • B

    Mass number decreases by four and atomic number decreases by two.

  • C

    Mass number and atomic number remain unchanged.

  • D

    Mass number remains unchanged while atomic number decreases by one.

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