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.

Question: For what purpose is the muscle tension technique applied in the treatment of blood phobia used ?: 
 Options:  <0> As a relaxation technique. <1> To divert the patient's attention from the feared stimulus. <2> To accelerate the habituation process. <3> To reduce vasovagal symptoms. <4> It is used in the first sessions to reduce anticipatory anxiety.
psychology

Question: The eggs are operculated: 
 Options:  <0> Hymenolepis nana. <1> Trichinella spiralis. <2> Enterobius vermicularis. <3> Fasciola hepatica. <4> Ascaris lumbricoides.
biology

Question: HEPA filters are used for the sterilization of: 
 Options:  <0> Organic liquids <1> Air. <2> Culture broth <3> Antibiotics <4> Sugar solutions

biology