Q: 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: The appearance of difficulties and respiratory infections as a consequence of the diminution of the defenses, is a dysfunction that occurs most likely in: 
 Options:  <0> Manic disorders. <1> Depressive disorders <2> Psychotic disorders <3> Personality disorders. <4> Schizophrenia.
A:
nursery