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: The chemical reactions of the splicing process of the introns during the maturation of the pre-mRNAs consists of: 
 Options:  <0> An oxidation-reduction reaction. <1> A transesterification reaction. <2> Two sequential transesterification reactions. <3> Three sequential transesterification reactions. <4> A transesterification reaction followed by another oxidation reaction.
[A]: chemistry


[Q]: Question: A 72-year-old man with a pathological fracture in the left femur goes to the Emergency Department. After the surgical intervention, the diagnostic study was performed to find out the underlying pathology with the following findings: hemoglobin 9.5 g / dl, total protein 11 g / dl, (VN: 6-8 g / dl), serum albumin 2 g / dl, (VN 3.5-5.0 g / dl), beta 2 microglobulin 6 mg / l (VN 1.1-2.4 mg / l), serum creatinine 1.8 mg / dl (VN: 0 , 1-1.4 mg / dl). Indicate what would be the diagnostic tests necessary to confirm the most probable diagnosis: 
 Options:  <0> Radiological bone series and bone marrow aspiration. <1> Serum and urinary electrophoresis and renal function tests. <2> Bone marrow aspirate and serum calcium concentration. <3> Bone marrow aspiration and serum and urinary electrophoresis. <4> Biopsy of the pathological fracture and radiological bone series.
[A]: medicine


[Q]: Question: A 34-year-old man consulted for fever and malaise. In the clinical history, homosexual relationships were collected for 4 months with a new partner. 2 months before the current consultation, she had an ulcerous lesion on the glans, painless, with bilateral inguinal adenopathies, all self-limiting. Serological studies are requested with the following results: HIV negative, RPR 1/320, TPHA 1/128. What treatment would you indicate in this patient? 
 Options:  <0> None. <1> Intravenous penicillin G, 24 MU every day for 14 days. <2> Penicillin Benzatine 2.4 MU intramuscular, three doses in three consecutive weeks. <3> Ceftriaxone 2 grams intramuscular in a single dose. <4> Penicillin Benzatine 2.4 MU intramuscular in a single dose.
[A]:
medicine