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Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R) :

Assertion (A) : When quantitative probabilistic risk assessment is performed on hazardous waste sites they usually turn out to be of relatively low threats.
Reason (R) : In hazardous waste sites the chance of exposure is low because of isolation of drinking water supplies and prevention of access.
Choose the correct answer :

  • A.Both (A) and (R) are true and (R) is the correct explanation of (A).
  • B.Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  • C.(A) is true, but (R) is false.
  • D.(A) is false, but (R) is true.

Answer: A

The key gives option A: both statements are true and the reason explains the assertion. Quantitative risk assessments of hazardous waste sites often show a low threat, because the chance of exposure is low where drinking water supplies are isolated and access is prevented, and that is the reason given. This explanation follows the official key.

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