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'.
Q: Question: What is the mechanism of action of the immunosuppressant drug everolimus ?:
Options: <1> Inhibition of the activation of lymphocytes as membrane receptors. <2> Inhibition of the transmission of the activation signals. <3> Inhibition of nucleotide synthesis. <4> Inhibition of lymphocyte migration. <5> Inhibition of proliferation signals.
A:
5