instruction:
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:
Question: Mrs. H. H. 69 years old complains that she does not sleep well. Regarding sleep in the elderly, it has been proven that: 
 Options:  <0> The non-pharmacological approach to insomnia has proved ineffective in this population. <1> The aging process is one of the main causes of insomnia. <2> They have a worse quality sleep, more fragmented and with early awakenings. <3> For the treatment of insomnia, the benzodiazepines of long half-life are those with the least side effect. <4> All hypnotics have the same side effects in the elderly.
answer:
nursery


question:
Question: The secretion of the sebaceous glands is: 
 Options:  <0> Merocrine <1> Apocrine <2> Paracrine <3> Holocrine <4> Endocrine
answer:
biology


question:
Question: In the activation of the serum complement, the assembly of the Membrane Attack Complex begins with: 
 Options:  <0> C9 <1> C5b. <2> C3a. <3> C6 <4> C8.
answer:

biology