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Assertion (A): Acceptable damage level is a design choice rather than a fixed value.
Reason (R): It depends on the consequence of damage and on the cost of repair at that site.

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

Answer: B

Correct answer: Both A and R are true, and R is the correct explanation of A

Both are true and the reason gives the basis of the choice. A breakwater protecting a nuclear intake or a busy port is designed to a lower damage level than one sheltering a fishing harbour, because the consequence of failure differs. So does the cost of repair - a remote site with no local quarry or plant may justify a heavier initial design simply because putting it right afterwards would be so expensive.

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