A 40-year-old male patient brought a request for the determination of serum testosterone hormone level. The laboratory technologist collected blood sample and started processing the measurement of testosterone hormone level by ELISA method. Which statement best describes the test principle of the method? a. Degree of interaction of serum Ag or Ab with reagent Ab or Ag, respectively b. Degree of refraction formed after a radiant energy passes through a turbid solution c. Degree of product formation between serum analyte and respective reagent d. Degree of emitted radiant energy when serum anayte returns inert after excitation
