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'.

Ex Input:
Question: Ferrous oxide, known as wustite (FeO) is non-stoichiometric because it contains:
Options: <1> Excess iron <2> Oxygen excess <3> Iron defect. <4> Oxygen defect. <5> Defect of iron and oxygen.

Ex Output:
3

Ex Input:
Question: The fundamental function of the basal ganglia is:
Options: <1> Control movement <2> Increase hearing <3> Improve the ability of taste. <4> Increase appetite <5> Increase urination

Ex Output:
1

Ex Input:
Question: The syndrome of inadequate secretion of antidiuretic hormone (SIADH) is characterized by:
Options: <1> Hyponatremia <2> Hypovolemia <3> Concentrations of sodium ion in urine less than 20 mmol / L. <4> Osmolality in urine less than serum osmolality. <5> High concentrations of calcium ion.

Ex Output:
1