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: The analysis by potentiometric redisolution is characterized: 
 Options:  <0> By using the square wave as an element of excitation. <1> Because the redisolution stage is carried out without agitation. <2> Because the reoxidation step is carried out by an oxidizing agent. <3> Because currents are measured in the redisolution stage. <4> Because the redisolution is carried out at constant potential.
[EX A]: chemistry

[EX Q]: Question: Question linked to image nº1 An 80-year-old woman is brought to the emergency department for acute abdominal pain that is accompanied by hypotension, tachycardia and fever of 38ºC. Between its antecedents it emphasizes a resection of left colon by carcinoma seven days before. After the initial resuscitation, a simple chest radiograph (shown) is performed, which is diagnostic of: 
 Options:  <0> Pneumoperitoneum <1> Intestinal obstruction. <2> Strangled crural hernia. <3> Left pneumothorax <4> Mesenteric ischemia.
[EX A]: medicine

[EX Q]: Question: In relation to the treatment of a non-smoking woman with non-small cell lung carcinoma, stage IV adenocarcinoma, which of the following statements is correct? 
 Options:  <0> The determination of the epidermal growth factor receptor (EGFR) mutation is required. <1> Entry Gefitinib is the standard treatment without EGFR determination. <2> It has a standard treatment based on camptothecins. <3> Any type of standard chemotherapy is valid. <4> There is no predictive factor for this disease.
[EX A]:
medicine