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Assertion (A): A dyehouse checks the strength of each dye delivery against a reference.
Reason (R): Commercial dye strength varies between lots and would otherwise shift every recipe.

  • 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 necessity: a two per cent strength difference is easily visible in a pale shade, and the recipe cannot correct for what the dyehouse does not know about. The reference lot is kept for comparison.

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