In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

[Q]: Question: Which of the following traumatic injuries requires, in order to avoid local complications, an earlier treatment?
Options: <0> Posterior traumatic luxation of the hip. <1> Displaced fracture of the femoral neck of the elderly. <2> Trochanteric fracture of the elderly. <3> Cup fracture. <4> Subtrochanteric fracture.
[A]: medicine

[Q]: 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: <0> Genital candidiasis <1> Chancroid. <2> Secondary syphilis <3> Balanitis by Trichomonas. <4> Fungal infection by dermatophytes.
[A]: medicine

[Q]: Question: Calcium fluoride is a white solid that is found as such in nature (fluorspar or fluorite, which can occur in many colors) and is used as an important source of fluoride. Among its physical and chemical properties include:
Options: <0> Its solubility in water, which differentiates it from the other group 2 fluorides. <1> Its resistance to concentrated sulfuric acid. <2> Its hydrolysis in water, which transforms it into CaO and HF. <3> Its relatively low melting point for a mineral. <4> Its favorable, although slow, oxidation to the air.
[A]:
chemistry