Final answer:
To convert 608 nanograms to centigrams, multiply 608 by the conversion factor 0.000001 cg/ng. The quantity of 608 nanograms expressed in centigrams is 0.000608 centigrams.
Step-by-step explanation:
To convert nanograms to centigrams, we need to use the conversion factor that relates the two units. The conversion factor between nanograms (ng) and centigrams (cg) is 1 nanogram = 0.000001 centigrams.
So, to convert 608 nanograms to centigrams, we need to multiply 608 by the conversion factor:
608 ng × 0.000001 cg/ng = 0.000608 cg
Therefore, the quantity of 608 nanograms expressed in centigrams is 0.000608 centigrams (option A).