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Assertion (A): CIELAB values quoted without a white point are ambiguous.
Reason (R): The coordinates depend on the reference white used in the calculation.

  • 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

Both are true and the reason gives the dependence, and D65 is a common but not universal choice. The white point must be stated alongside the values. D65 is common but by no means universal. The white point must be stated explicitly.

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