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 solubility of copper hydroxide in the presence of a high concentration of ammonia: 
 Options:  <0> Increased by formation of a complex ion of Cu2 + with NH3. <1> It is not affected because there is no common ion effect. <2> Decreases by common ion effect. <3> It decreases upon oxidation of bromide to molecular bromine. <4> It decreases because the hydroxides are more soluble in acidic medium.

A: chemistry
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Q: Question: A randomized phase III clinical trial compared the efficacy of a new analgesic (experimental) with a control treatment (tramadol) in patients with chronic pain. The working hypothesis was that experimental treatment reduces pain more than tramadol. The effect of the two treatments was determined at 48 hours by reducing the score marked by the patient on an analog - visual scale from 0 to 100 mm. The mean reduction in the tramadol group was -27 and in the experimental group of -31. The hypothesis was contrasted for the differences, with the corresponding statistical test and a value of p = 0.03 was obtained. Regarding the previous study, which of the following conclusions seems more correct? 
 Options:  <0> The study demonstrated clinically relevant differences. <1> The differences in the analgesic effect between the two treatments studied were significant. <2> The benefit - risk of the experimental treatment was better than that of tramadol. <3> The experimental treatment was 20% better than tramadol. <4> We can recommend the widespread use of experimental treatment, because it is more effective than tramadol in the treatment of chronic pain.

A: medicine
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Q: Question: A 45-year-old patient who went to the emergency room for general malaise, headache and progressive tiredness in recent weeks. On physical examination, a slight icteric dye of the skin and mucous membranes was detected and a 2-cm splenomegaly was felt under the costal margin. The analytical presents hemoglobin 8.6 g / dL, VCM 100 fL. The number of reticulocytes is high and anisopoikilocytosis is observed in the blood smear. In the biochemistry highlights LDH 1300 IU / L, bilirubin 2.2 mg / dL and undetectable haptoglobin. Which test is the most appropriate to guide the diagnosis of the patient? 
 Options:  <0> Fecal occult blood test. <1> Test of Coombs. <2> Determination of iron, cobalamin and folic acid. <3> Abdominal ultrasound. <4> Bone marrow aspirate.

A:
medicine
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