Q112 / 180 · AIIMS 2007 · Physics

Assertion : \({ }^{94} \mathrm{Sr}\) from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells. Reason : The energetics \(\beta\)-particles emitted in the decay of \({ }^{94} \mathrm{Sr}\) damage the bone marrow.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

\({ }^{94} \mathrm{Sr}\) from \({ }^{235} \mathrm{U}\) fission is absorbed through milk. Their emission of \(\beta^{-}\)particles will damage the bone-marrow as \(\mathrm{Sr}\) is absorbed in bones.

Hence, the correct answer is option: 'A'.

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