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: In which personality disorder can the individual have unfounded and recurrent suspicions about the fidelity of the couple, as well as having doubts about the loyalty or honesty of the friends or acquaintances ?:
Options: <0> In the celotypic personality disorder. <1> In delusional personality disorder. <2> In the dependent personality disorder. <3> In the paranoid personality disorder. <4> In narcissistic personality disorder.

A: psychology
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Q: Question: In what type of hearing loss is the phenomenon of recruitment or recruitment characteristic?
Options: <0> Transmission hearing loss. <1> Mixed hearing loss. <2> Central hearing loss. <3> Retrocochlear hearing loss. <4> Cochlear hearing loss.

A: medicine
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Q: Question: The immersion oil used for microscopic observation:
Options: <0> Protects the sample from the oxidizing effect of air. <1> Lubricate the objective lens. <2> Reduces refraction and increases resolution. <3> It acts as a lens that increases magnification. <4> Avoid dehydration of the preparation.

A:
biology
****