Arrange the following routes of drug administration from shortest to longest in terms of duration:
a) Intravenous, Intramuscular, Oral, Subcutaneous
b) Oral, Intramuscular, Subcutaneous, Intravenous
c) Intravenous, Subcutaneous, Intramuscular, Oral
d) Subcutaneous, Oral, Intravenous, Intramuscular
