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: In economic evaluations, which of the following costs correspond to indirect non-health costs? 
 Options:  <0> Hospitalization of the patient. <1> Care at the patient's home. <2> Loss of patient productivity. <3> Travel expenses of the patient. <4> Rehabilitation of the patient.
[EX A]: medicine

[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 alkaline error that occurs in glass electrodes for the average pH: 
 Options:  <0> It is due to the presence of an excessive concentration of protons that is replaced by sodium ions in the glass membrane. <1> Occurs at neutral pH due to the absence of protons. <2> It takes place at very alkaline pH, in which the sodium ion behaves as if it were a proton. <3> It appears as a consequence of the dehydration of the glass membrane. <4> It occurs when the electrode is introduced into pure water due to the dissolution of the sodium ions in the membrane.
[EX A]:
chemistry