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: To diagnose a situation of cardiorespiratory arrest, the correct sequence of assessment according to the recommendations of the Guide 2010 of the Spanish Council of Cardiopulmonary Resuscitation consists of: 
 Options:  <0> Check unconsciousness, check signs of life or presence of pulse, check if you breathe and open the airway. <1> Check unconsciousness, alert, open the airway and check if it breathes. <2> Check pulse, alert, open the airway, check unconsciousness, check if you breathe. <3> Open the airway, check unconsciousness, check for pulse or signs of life (cough, movement) and check if you breathe. <4> Open the airway, alert, check if you breathe, check presence of pulse or signs of life and check unconsciousness.
[EX A]: nursery

[EX Q]: Question: The reaction conditions for the preparation of 2-methyl-2-methoxypropan-1-ol from 2,2-dimethyloxirane are: 
 Options:  <0> Methanol in acid medium. <1> Lithium aluminum hydride in methanol. <2> Methylmagnesium bromide and subsequent hydrolysis. <3> Sodium methoxide in methanol. <4> Triphenylphosphine in methanol.
[EX A]: chemistry

[EX Q]: Question: The main autocrine growth factor for most T lymphocytes after antigen recognition is: 
 Options:  <0> Interleukin 2 <1> Interleukin 4 <2> Interleukin 10 <3> TGF-beta. <4> All the previous ones
[EX A]:
biology