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: A 24-year-old boy who, after 3 days of high-risk sexual contact, has numerous pustular, small, very pruritic lesions that progress to minute erosions affecting the entire glans and inner face of the prepuce. Indicate which is, among the following, the most probable diagnostic orientation:
Options: <1> Genital candidiasis <2> Chancroid. <3> Secondary syphilis <4> Balanitis by Trichomonas. <5> Fungal infection by dermatophytes.

Ex Output:
1

Ex Input:
Question: Which of the following medications is an anti CD20 monoclonal antibody used in the treatment of rheumatoid arthritis?
Options: <1> Alemtuzumab <2> Muromunab. <3> Abalizumab <4> Rituximab <5> Visilizumab.

Ex Output:
4

Ex Input:
Question: The synthesis of a human protein by a bacterium, to which human DNA has been introduced, demonstrates that:
Options: <1> Evolution can be questioned. <2> Bacteria can acquire nucleus. <3> The genetic code is universal. <4> The human proteins are identical to the proteins of the bacteria. <5> The bacteria can be pathogenic.

Ex Output:
3