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Assertion (A): A compartment model should use no more elements than the tracer data justify.
Reason (R): Extra adjustable parameters can fit any curve without describing anything real.

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

Answer: D

Both are true and the reason gives the discipline: a model with four parameters will fit almost any response, and the fit then says nothing about the vessel it was supposed to describe. Data must justify each parameter.

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