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: Why is the presence of lentigo in older people? 
 Options:  <0> Cell dehydration <1> Small hemorrhages due to capillary fragility. <2> Hyperplasia of intraepidermal melanocytes. <3> Deficiency of collagen and elastin. <4> Lipofuscin deposits.
[A]: nursery


[Q]: Question: A calcium figure of 11 mg / dL (normal less than 10.5 mg / dL) is found in a 30-year-old patient during a routine business examination. The PTH determination was 45 pg / ml (VN 10-55 pg / ml). The story is anodyne, except for the fact that the mother and the paternal grandfather were diagnosed with hyperparathyroidism and intervened, although they remained hypercalcemic. Which test is most useful to confirm the diagnosis? 
 Options:  <0> 25-OH D. <1> 1,25-OH 2D. <2> Calcium / creatinine ratio in urine. <3> Tubular reabsorption of phosphates. <4> PTHrP.
[A]: medicine


[Q]: Question: They send efferent projections from the cerebellar cortex the: 
 Options:  <0> Purkinje cells. <1> Climbing fibers <2> Granular cells. <3> Horizontal cells. <4> Mossy fibers.
[A]:
biology