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: When comparing the characteristics of pragmatic or confirmatory clinical studies with explanatory or exploratory clinical studies, which of the following is an advantage of the former? 
 Options:  <0> Information about subgroups of patients representative of the usual clinical practice. <1> Very homogeneous sample, with little variability. <2> Greater capacity to detect differences in the effectiveness of interventions. <3> Greater internal validity <4> Smaller sample size

A: medicine
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Q: Question: Question linked to the image nº15 Patient of 25 years of age transferred to the Rescue Box of the Emergency Service after traffic accident. At admission, he is hypotensive, tachycardic and tachypneic. Portable chest radiography shows right costal fractures from the fourth costal arch to the ninth and right pulmonary contusion image, and the pelvis is attached. What is the best behavior next? 
 Options:  <0> Perform abdominal ultrasound in the emergency box. <1> Request a chest computed tomography. <2> Request pelvic angiography. <3> Request computed tomography of the abdomen and pelvis. <4> Immediately enter the patient in the intensive care unit.

A: medicine
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Q: Question: A 20-year-old girl comes to the clinic with an acute fever, cervical adenopathy and skin rash. According to the patient, 3 weeks ago, she had a sexual relationship that could be at risk for contracting the HIV virus. Does it indicate which of the following answers is true? 
 Options:  <0> A negative HIV-1 / HIV-2 serology performed using the ELISA technique rules out the possibility that the patient has been infected with the HIV virus. <1> The clinical process suffered by the patient does not match that of acute HIV infection. <2> If the patient's ELISA test was positive, it would not be necessary to do anything else for the diagnosis of HIV infection. <3> The ELISA technique has a high sensitivity for the diagnosis of HIV infection, but its specificity is even greater. <4> If the ELISA test to diagnose HIV in the patient was negative, we could determine by the PCR technique the viral load in blood.

A:
medicine
****