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: The number of nodes of the LUMO (unoccupied orbital of lower energy) of 1,3-butadiene is: 
 Options:  <0> None. <1> One. <2> Two. <3> Three. <4> Four.
[A]: chemistry


[Q]: Question: In the training in HHSS applied to social phobia, modeling is used for the learning of certain skills. The chosen model must be: 
 Options:  <0> Very competent and keep that competition constant throughout the training. <1> Be relatively competent (a little more than the subject you train) and increase the competition throughout the training. <2> Be very competent and decrease your competence. <3> Being incompetent so that the patient can identify with him. <4> Must be a little more competent than the patient and not progress so that as the learning progresses the patient will overcome and increase their motivation.
[A]: psychology


[Q]: Question: Among the epidemiological criteria of causality defined by Bradford Hill (1965) is NOT: 
 Options:  <0> Strength of association. <1> Temporal sequence. <2> Biological gradient <3> Cessation or reversibility effect. <4> Presence of alternative explanations.
[A]:
nursery