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.

[EX Q]: Question: A 70-year-old man presented with progressive dyspnea and a non-productive cough several years old. In chest X-ray, pleural plaques are seen in the mediastinal and diaphragmatic pleura. On CT, these plaques are confirmed, also appreciating the presence of reticulonodulillar involvement predominantly in lower fields. Among the following, what attitude would you recommend in the first place? 
 Options:  <0> Complete your smoking history. <1> Inquire about occupational exposure. <2> Request blood tests to rule out eosinophilia. <3> Do complete respiratory functional tests. <4> Propose a transbronchial biopsy.
[EX A]: medicine

[EX Q]: Question: By means of the angular methods used to evaluate the flow properties of a powder, it is determined: 
 Options:  <0> The ease with which the solid sets in motion. <1> The angle of repose. <2> The flow velocity <3> The resistance to displacement. <4> The density of the powder.
[EX A]: pharmacology

[EX Q]: Question: A light-emitting diode: 
 Options:  <0> It is the same as a photovoltaic cell. <1> It is the inverse of a photovoltaic cell. <2> It is the same as a photovoltaic cell. <3> It is the inverse of a photovoltaic cell. <4> It is equivalent to a photochemical cell.
[EX A]:
chemistry