Step 1: Concept
Plasma proteins like globulins bind to specific drugs and endogenous substances.
Step 2: Meaning
A. Gamma globulin binds specific antigens. B. Ceruloplasmin primarily binds copper, not Vitamin D. C. Transferrin binds ferrous/ferric ions. D. Beta-2 globulin binds cortisone.
Step 3: Analysis
Pairs A, C, and D represent accurate binding affinities found in human plasma. Pair B is incorrect as ceruloplasmin is a copper-carrying protein.
Step 4: Conclusion
The correct choices are A, C, and D.
Final Answer: (D)