Identify a Difference Between Free Drug Molecules and Drug Molecules

Identify a difference between free drug molecules and drug molecules that are bound to plasma proteins.

A) Only unbound or free drug molecules can exert a pharmacological effect.
B) Only the drug molecules that are bound to plasma can exert a pharmacological effect.
C) Free drug molecules exert a lower level of pharmacological effect than drug molecules that are bound to plasma.
D) None of the above statements are correct.