Arrange the following drugs in order of their degree of protein-binding from greatest to least ________.
1) Propofol, Midazolam, Etomidate, Ketamine
2) Midazolam, Propofol, Etomidate, Ketamine
3) Propofol, Etomidate, Midazolam, Ketamine
4) Etomidate, Propofol, Midazolam, Ketamine