Q: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Question: With respect to the pharmacological activity of artemisinin (sesquiterpene lactone) extracted from Artemisia annua:
Options: <1> It is a powerful hepatoprotective. <2> It is a powerful cholagogue. <3> It is a potent antitumor. <4> It is a selective antimalarial. <5> It is a potent antiviral.
A:
4