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: In the synthesis of DNA, the quinolones act:
Options: <1> Joining the double helix and thus blocking the progress of the replication fork. <2> Interlacing in the double helix and thus causing errors in the transcription. <3> On DNA gyrase. <4> As nucleotide analogs that are incorporated into DNA. <5> About DNA polymerases.

Ex Output:
3

Ex Input:
Question: The prodromal phase of a psychotic episode is characterized by:
Options: <1> A deviation from emotional, cognitive, behavioral or social functioning and the presence of nonspecific symptoms. <2> Being a critical period during which the person should be treated. <3> The appearance of the first psychotic episode. <4> Be comparable to what is called the duration of untreated psychosis. <5> The functional recovery of the patient, which causes that it can be incorporated into working life gradually.

Ex Output:
1