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Assertion (A): The CIEDE2000 rotation term acts almost entirely in the blue region.
Reason (R): Experimental ellipses were found to be tilted only in that part of the space.

  • 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 empirical basis, and the term is negligible elsewhere. It is the most distinctive feature of the formula. It is negligible outside the blue region. Ellipse tilt was found only there.

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