Quick Biochemistry - Hormone Metabolism (Section 2 - No. 10)

What is a typical range for the concentration of thyroxine (T₄) in serum?

2.0-4.0 µg/100 ml

5.5-13.5 µg/100 ml

14.0-20.3 µg/100 ml

20.0-25.0 µg/100 ml