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: A basic component of spectrophotometers is the monochromator. Its function is: 
 Options:  <0> Connect the different wavelengths from the source to achieve greater light power. <1> Transform the optical signal measured by the detector into an electrical signal. <2> Disperse the light separating the wavelengths that compose it and select a narrow band. <3> Amplify the analytical signal by improving the signal-to-noise ratio. <4> Decrease the power of the light beam to eliminate the background noise of the spectrophotometer.
[A]: chemistry


[Q]: Question: In studies that use meta-analysis for the systematic review of the results of psychotherapies, which is the most used dependent variable? : 
 Options:  <0> The number of depressive symptoms. <1> The size of the effect. <2> The systematized observation of the therapist. <3> The number of patients that has been cured. <4> The expectations of the patient.
[A]: psychology


[Q]: Question: Question linked to image nº4 70-year-old man, active smoker, who underwent a chest radiological study as a preoperative protocol for prostatic hypertrophy. What would be the fundamental semiological finding of this radiological image? 
 Options:  <0> Encapsulated left pleural effusion. <1> Tumor of the anterior soft tissues of the thorax. <2> Collapse of the left upper lobe. <3> Anterior mediastinal mass. <4> Elevation of the left diaphragmatic dome.
[A]:
medicine