Lead concentration in blood is considered alarming if it is

  • A
    $20 \, \mu g/100 \, ml$
  • B
    $30 \, \mu g/100 \, ml$
  • C
    $10 \, \mu g/100 \, ml$
  • D
    $4-6 \, \mu g/100 \, ml$

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