The radius of the nucleus of ${ }_{13}^{27} Al$ is $\qquad$ . (Given: $R_{0}=1.2 \text{ fm}$)

  • A
    $3.0 \times 10^{-15} \text{ m}$
  • B
    $3.2 \times 10^{-14} \text{ m}$
  • C
    $3.6 \times 10^{-15} \text{ m}$
  • D
    $3.6 \times 10^{-12} \text{ m}$

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$(E)$ Density of the nucleus is independent of the mass number.
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