Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$

Assertion $A:$ The binding energy per nucleon is practically independent of the atomic number for nuclei of mass number in the range $30$ to $170$.

Reason $R$ : Nuclear force is short ranged.

In the light of the above statements, choose the correct answer from the options given below on

  • [JEE MAIN 2023]
  • A

    Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$

  • B

    $A$ is true but $R$ is false

  • C

    $A$ is false but $R$ is true

  • D

    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

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  • [KVPY 2019]