The disintegration constant of radium with a half-life of $1600 \ years$ is:

  • A
    $2.12 \times 10^{-4} \ year^{-1}$
  • B
    $4.33 \times 10^{-4} \ year^{-1}$
  • C
    $3.26 \times 10^{-3} \ year^{-1}$
  • D
    $4.33 \times 10^{-12} \ year^{-1}$

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