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: Indicate which of the following options does NOT suppose a normal response of the child's motor development in its first year of life: 
 Options:  <0> By 3 months, he is able to hold his head when he is incorporated. <1> By 4 months, the trunk begins to straighten up although the balance is still immature. <2> By 8 months, he dominates the sitting position and frees his hands to hold objects while maintaining balance. <3> Towards 10 months, start some steps. <4> By 12 months, the act of running appears.
[A]: nursery


[Q]: Question: The recommended antibiotic treatment for acute diarrhea caused by Clostridium difficile is: 
 Options:  <0> Administer vancomycin orally. <1> Administer vancomycin intravenously. <2> Administer ciprofloxacin orally. <3> Administer metronidazole orally. <4> Administer rifaximin orally.
[A]: medicine


[Q]: Question: The class I genes of the Major Histocompatibility Complex: 
 Options:  <0> They are few <1> They are very polymorphic. <2> They express their alleles according to allelic exclusion. <3> They are expressed in all the cells of the organism. <4> They code glycolipids.
[A]:
biology