You will be given a definition of a task first, then some input of the task.
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: Ms. X is a 76-year-old patient who has suffered several falls in recent years with fractures in both arms. The diagnosis by image denotes the evidence of osteoporosis and the traumatologist decides to start a treatment with teriparatide. We must consider that:
Options: <1> Teriparatide is an analogue of vitamin D. <2> It is administered in a daily dose subcutaneously. <3> It is administered only intravenously. <4> Acts as a receptor agonist to vitamin D3. <5> It does not favor the increase of bone mass.
Output:
2